diff --git a/backend/src/config.ts b/backend/src/config.ts
index 65582c8b..69af5d74 100644
--- a/backend/src/config.ts
+++ b/backend/src/config.ts
@@ -1,5 +1,5 @@
 import { EnvVars, getEnvVar } from './util/envvars.js';
-import {Language} from "./entities/content/language.js";
+import { Language } from './entities/content/language.js';
 
 // API
 export const DWENGO_API_BASE = getEnvVar(EnvVars.LearningContentRepoApiBaseUrl);
diff --git a/backend/src/controllers/assignments.ts b/backend/src/controllers/assignments.ts
index dcaa07a2..b0695b85 100644
--- a/backend/src/controllers/assignments.ts
+++ b/backend/src/controllers/assignments.ts
@@ -9,10 +9,7 @@ interface AssignmentParams {
     id: string;
 }
 
-export async function getAllAssignmentsHandler(
-    req: Request<AssignmentParams>,
-    res: Response
-): Promise<void> {
+export async function getAllAssignmentsHandler(req: Request<AssignmentParams>, res: Response): Promise<void> {
     const classid = req.params.classid;
     const full = req.query.full === 'true';
 
@@ -23,18 +20,11 @@ export async function getAllAssignmentsHandler(
     });
 }
 
-export async function createAssignmentHandler(
-    req: Request<AssignmentParams>,
-    res: Response,
-): Promise<void> {
+export async function createAssignmentHandler(req: Request<AssignmentParams>, res: Response): Promise<void> {
     const classid = req.params.classid;
     const assignmentData = req.body as AssignmentDTO;
 
-    if (!assignmentData.description 
-        || !assignmentData.language 
-        || !assignmentData.learningPath 
-        || !assignmentData.title
-    ) {
+    if (!assignmentData.description || !assignmentData.language || !assignmentData.learningPath || !assignmentData.title) {
         res.status(400).json({
             error: 'Missing one or more required fields: title, description, learningPath, title',
         });
@@ -44,17 +34,14 @@ export async function createAssignmentHandler(
     const assignment = createAssignment(classid, assignmentData);
 
     if (!assignment) {
-        res.status(500).json({ error: "Could not create assignment "});
+        res.status(500).json({ error: 'Could not create assignment ' });
         return;
     }
 
     res.status(201).json({ assignment: assignment });
 }
 
-export async function getAssignmentHandler(
-    req: Request<AssignmentParams>,
-    res: Response
-): Promise<void> {
+export async function getAssignmentHandler(req: Request<AssignmentParams>, res: Response): Promise<void> {
     const id = +req.params.id;
     const classid = req.params.classid;
 
@@ -73,10 +60,7 @@ export async function getAssignmentHandler(
     res.json(assignment);
 }
 
-export async function getAssignmentsSubmissionsHandler(
-    req: Request<AssignmentParams>,
-    res: Response,
-): Promise<void> {
+export async function getAssignmentsSubmissionsHandler(req: Request<AssignmentParams>, res: Response): Promise<void> {
     const classid = req.params.classid;
     const assignmentNumber = +req.params.id;
 
diff --git a/backend/src/controllers/classes.ts b/backend/src/controllers/classes.ts
index 5fd4ce9d..6fb58fb9 100644
--- a/backend/src/controllers/classes.ts
+++ b/backend/src/controllers/classes.ts
@@ -1,19 +1,9 @@
 import { Request, Response } from 'express';
-import {
-    createClass,
-    getAllClasses,
-    getClass,
-    getClassStudents,
-    getClassStudentsIds,
-    getClassTeacherInvitations,
-} from '../services/class.js';
+import { createClass, getAllClasses, getClass, getClassStudents, getClassStudentsIds, getClassTeacherInvitations } from '../services/class.js';
 import { ClassDTO, mapToClass } from '../interfaces/class.js';
 import { getClassRepository, getStudentRepository, getTeacherRepository } from '../data/repositories.js';
 
-export async function getAllClassesHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getAllClassesHandler(req: Request, res: Response): Promise<void> {
     const full = req.query.full === 'true';
     const classes = await getAllClasses(full);
 
@@ -22,10 +12,7 @@ export async function getAllClassesHandler(
     });
 }
 
-export async function createClassHandler(
-    req: Request,
-    res: Response,
-): Promise<void> {
+export async function createClassHandler(req: Request, res: Response): Promise<void> {
     const classData = req.body as ClassDTO;
 
     if (!classData.displayName) {
@@ -38,17 +25,14 @@ export async function createClassHandler(
     const cls = await createClass(classData);
 
     if (!cls) {
-        res.status(500).json({ error: "Something went wrong while creating class" });
-        return
+        res.status(500).json({ error: 'Something went wrong while creating class' });
+        return;
     }
 
     res.status(201).json({ class: cls });
 }
 
-export async function getClassHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getClassHandler(req: Request, res: Response): Promise<void> {
     try {
         const classId = req.params.id;
         const cls = await getClass(classId);
@@ -71,26 +55,18 @@ export async function getClassHandler(
     }
 }
 
-export async function getClassStudentsHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getClassStudentsHandler(req: Request, res: Response): Promise<void> {
     const classId = req.params.id;
     const full = req.query.full === 'true';
 
-    const students = full
-        ? await getClassStudents(classId)
-        : await getClassStudentsIds(classId);
+    const students = full ? await getClassStudents(classId) : await getClassStudentsIds(classId);
 
     res.json({
         students: students,
     });
 }
 
-export async function getTeacherInvitationsHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getTeacherInvitationsHandler(req: Request, res: Response): Promise<void> {
     const classId = req.params.id;
     const full = req.query.full === 'true'; // TODO: not implemented yet
 
diff --git a/backend/src/controllers/groups.ts b/backend/src/controllers/groups.ts
index 9ef5b93c..dbe83060 100644
--- a/backend/src/controllers/groups.ts
+++ b/backend/src/controllers/groups.ts
@@ -9,10 +9,7 @@ interface GroupParams {
     groupid?: string;
 }
 
-export async function getGroupHandler(
-    req: Request<GroupParams>,
-    res: Response
-): Promise<void> {
+export async function getGroupHandler(req: Request<GroupParams>, res: Response): Promise<void> {
     const classId = req.params.classid;
     const full = req.query.full === 'true';
     const assignmentId = +req.params.assignmentid;
@@ -34,10 +31,7 @@ export async function getGroupHandler(
     res.json(group);
 }
 
-export async function getAllGroupsHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getAllGroupsHandler(req: Request, res: Response): Promise<void> {
     const classId = req.params.classid;
     const full = req.query.full === 'true';
 
@@ -55,10 +49,7 @@ export async function getAllGroupsHandler(
     });
 }
 
-export async function createGroupHandler(
-    req: Request,
-    res: Response,
-): Promise<void> {
+export async function createGroupHandler(req: Request, res: Response): Promise<void> {
     const classid = req.params.classid;
     const assignmentId = +req.params.assignmentid;
 
@@ -71,17 +62,14 @@ export async function createGroupHandler(
     const group = createGroup(groupData, classid, assignmentId);
 
     if (!group) {
-        res.status(500).json({ error: "Something went wrong while creating group" });
-        return
+        res.status(500).json({ error: 'Something went wrong while creating group' });
+        return;
     }
 
     res.status(201).json({ group: group });
 }
 
-export async function getGroupSubmissionsHandler(
-    req: Request,
-    res: Response,
-): Promise<void> {
+export async function getGroupSubmissionsHandler(req: Request, res: Response): Promise<void> {
     const classId = req.params.classid;
     // Const full = req.query.full === 'true';
 
@@ -104,4 +92,4 @@ export async function getGroupSubmissionsHandler(
     res.json({
         submissions: submissions,
     });
-}
\ No newline at end of file
+}
diff --git a/backend/src/controllers/questions.ts b/backend/src/controllers/questions.ts
index b4451aa2..917b48ae 100644
--- a/backend/src/controllers/questions.ts
+++ b/backend/src/controllers/questions.ts
@@ -1,121 +1,119 @@
-import {Request, Response} from "express";
-import {
-    createQuestion,
-    deleteQuestion,
-    getAllQuestions,
-    getAnswersByQuestion,
-    getQuestion
-} from "../services/questions.js";
-import {QuestionDTO, QuestionId} from "../interfaces/question.js";
-import {FALLBACK_LANG, FALLBACK_SEQ_NUM} from "../config.js";
-import {LearningObjectIdentifier} from "../entities/content/learning-object-identifier.js";
-import {Language} from "../entities/content/language.js";
+import { Request, Response } from 'express';
+import { createQuestion, deleteQuestion, getAllQuestions, getAnswersByQuestion, getQuestion } from '../services/questions.js';
+import { QuestionDTO, QuestionId } from '../interfaces/question.js';
+import { FALLBACK_LANG, FALLBACK_SEQ_NUM } from '../config.js';
+import { LearningObjectIdentifier } from '../entities/content/learning-object-identifier.js';
+import { Language } from '../entities/content/language.js';
 
 function getObjectId(req: Request, res: Response): LearningObjectIdentifier | null {
-    const { hruid, version } = req.params
-    const lang = req.query.lang
+    const { hruid, version } = req.params;
+    const lang = req.query.lang;
 
-    if (!hruid || !version ) {
-        res.status(400).json({ error: "Missing required parameters." });
+    if (!hruid || !version) {
+        res.status(400).json({ error: 'Missing required parameters.' });
         return null;
     }
 
     return {
         hruid,
-        language: lang as Language || FALLBACK_LANG,
-        version: +version
-    }
+        language: (lang as Language) || FALLBACK_LANG,
+        version: +version,
+    };
 }
 
 function getQuestionId(req: Request, res: Response): QuestionId | null {
-    const seq = req.params.seq
-    const learningObjectIdentifier = getObjectId(req,res);
+    const seq = req.params.seq;
+    const learningObjectIdentifier = getObjectId(req, res);
 
-    if (!learningObjectIdentifier)
-        {return null}
+    if (!learningObjectIdentifier) {
+        return null;
+    }
 
     return {
         learningObjectIdentifier,
-        sequenceNumber: seq ? Number(seq) : FALLBACK_SEQ_NUM
-    }
+        sequenceNumber: seq ? Number(seq) : FALLBACK_SEQ_NUM,
+    };
 }
 
-export async function getAllQuestionsHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getAllQuestionsHandler(req: Request, res: Response): Promise<void> {
     const objectId = getObjectId(req, res);
     const full = req.query.full === 'true';
 
-    if (!objectId)
-        {return}
+    if (!objectId) {
+        return;
+    }
 
     const questions = await getAllQuestions(objectId, full);
 
-    if (!questions)
-        {res.status(404).json({ error: `Questions not found.` });}
-    else
-        {res.json(questions);}
+    if (!questions) {
+        res.status(404).json({ error: `Questions not found.` });
+    } else {
+        res.json(questions);
+    }
 }
 
 export async function getQuestionHandler(req: Request, res: Response): Promise<void> {
     const questionId = getQuestionId(req, res);
 
-    if (!questionId)
-        {return}
+    if (!questionId) {
+        return;
+    }
 
     const question = await getQuestion(questionId);
 
-    if (!question)
-        {res.status(404).json({ error: `Question not found.` });}
-    else
-        {res.json(question)}
+    if (!question) {
+        res.status(404).json({ error: `Question not found.` });
+    } else {
+        res.json(question);
+    }
 }
 
 export async function getQuestionAnswersHandler(req: Request, res: Response): Promise<void> {
     const questionId = getQuestionId(req, res);
     const full = req.query.full === 'true';
 
-    if (!questionId)
-        {return}
+    if (!questionId) {
+        return;
+    }
 
     const answers = getAnswersByQuestion(questionId, full);
 
-    if (!answers)
-        {res.status(404).json({ error: `Questions not found.` });}
-    else
-        {res.json(answers)}
+    if (!answers) {
+        res.status(404).json({ error: `Questions not found.` });
+    } else {
+        res.json(answers);
+    }
 }
 
 export async function createQuestionHandler(req: Request, res: Response): Promise<void> {
     const questionDTO = req.body as QuestionDTO;
 
     if (!questionDTO.learningObjectIdentifier || !questionDTO.author || !questionDTO.content) {
-        res.status(400).json({error: 'Missing required fields: identifier and content'});
+        res.status(400).json({ error: 'Missing required fields: identifier and content' });
         return;
     }
 
     const question = await createQuestion(questionDTO);
 
-    if (!question)
-        {res.status(400).json({error: 'Could not add question'});}
-    else
-        {res.json(question)}
+    if (!question) {
+        res.status(400).json({ error: 'Could not add question' });
+    } else {
+        res.json(question);
+    }
 }
 
 export async function deleteQuestionHandler(req: Request, res: Response): Promise<void> {
     const questionId = getQuestionId(req, res);
 
-    if (!questionId)
-        {return}
+    if (!questionId) {
+        return;
+    }
 
     const question = await deleteQuestion(questionId);
 
-    if (!question)
-        {res.status(400).json({error: 'Could not find nor delete question'});}
-    else
-        {res.json(question)}
+    if (!question) {
+        res.status(400).json({ error: 'Could not find nor delete question' });
+    } else {
+        res.json(question);
+    }
 }
-
-
-
diff --git a/backend/src/controllers/students.ts b/backend/src/controllers/students.ts
index aae37b50..5c17513d 100644
--- a/backend/src/controllers/students.ts
+++ b/backend/src/controllers/students.ts
@@ -10,9 +10,7 @@ import {
 } from '../services/students.js';
 import { ClassDTO } from '../interfaces/class.js';
 import { getAllAssignments } from '../services/assignments.js';
-import {
-    getUserHandler,
-} from './users.js';
+import { getUserHandler } from './users.js';
 import { Student } from '../entities/users/student.entity.js';
 import { StudentDTO } from '../interfaces/student.js';
 import { getStudentRepository } from '../data/repositories.js';
@@ -20,17 +18,12 @@ import { UserDTO } from '../interfaces/user.js';
 
 // TODO: accept arguments (full, ...)
 // TODO: endpoints
-export async function getAllStudentsHandler(
-    req: Request,
-    res: Response,
-): Promise<void> {
+export async function getAllStudentsHandler(req: Request, res: Response): Promise<void> {
     const full = req.query.full === 'true';
 
     const studentRepository = getStudentRepository();
 
-    const students: StudentDTO[] | string[] = full
-        ? await getAllStudents()
-        : await getAllStudents();
+    const students: StudentDTO[] | string[] = full ? await getAllStudents() : await getAllStudents();
 
     if (!students) {
         res.status(404).json({ error: `Student not found.` });
@@ -40,11 +33,7 @@ export async function getAllStudentsHandler(
     res.status(201).json(students);
 }
 
-
-export async function getStudentHandler(
-    req: Request,
-    res: Response,
-): Promise<void> {
+export async function getStudentHandler(req: Request, res: Response): Promise<void> {
     const username = req.params.username;
 
     if (!username) {
@@ -64,10 +53,7 @@ export async function getStudentHandler(
     res.status(201).json(user);
 }
 
-export async function createStudentHandler(
-    req: Request,
-    res: Response,
-) {
+export async function createStudentHandler(req: Request, res: Response) {
     const userData = req.body as StudentDTO;
 
     if (!userData.username || !userData.firstName || !userData.lastName) {
@@ -81,10 +67,7 @@ export async function createStudentHandler(
     res.status(201).json(newUser);
 }
 
-export async function deleteStudentHandler(
-    req: Request,
-    res: Response,
-) {
+export async function deleteStudentHandler(req: Request, res: Response) {
     const username = req.params.username;
 
     if (!username) {
@@ -103,10 +86,7 @@ export async function deleteStudentHandler(
     res.status(200).json(deletedUser);
 }
 
-export async function getStudentClassesHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getStudentClassesHandler(req: Request, res: Response): Promise<void> {
     try {
         const full = req.query.full === 'true';
         const username = req.params.id;
@@ -132,10 +112,7 @@ export async function getStudentClassesHandler(
 // Might not be fully correct depending on if
 // A class has an assignment, that all students
 // Have this assignment.
-export async function getStudentAssignmentsHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getStudentAssignmentsHandler(req: Request, res: Response): Promise<void> {
     const full = req.query.full === 'true';
     const username = req.params.id;
 
@@ -146,24 +123,18 @@ export async function getStudentAssignmentsHandler(
     });
 }
 
-export async function getStudentGroupsHandler(
-    req: Request,
-    res: Response,
-): Promise<void> {
+export async function getStudentGroupsHandler(req: Request, res: Response): Promise<void> {
     const full = req.query.full === 'true';
     const username = req.params.id;
 
     const groups = await getStudentGroups(username, full);
-    
+
     res.json({
         groups: groups,
     });
 }
 
-export async function getStudentSubmissionsHandler(
-    req: Request,
-    res: Response,
-): Promise<void> {
+export async function getStudentSubmissionsHandler(req: Request, res: Response): Promise<void> {
     const username = req.params.id;
 
     const submissions = await getStudentSubmissions(username);
@@ -175,4 +146,3 @@ export async function getStudentSubmissionsHandler(
 function getAllStudents(): StudentDTO[] | string[] | PromiseLike<StudentDTO[] | string[]> {
     throw new Error('Function not implemented.');
 }
-
diff --git a/backend/src/controllers/submissions.ts b/backend/src/controllers/submissions.ts
index 96f0185c..1e66dbe9 100644
--- a/backend/src/controllers/submissions.ts
+++ b/backend/src/controllers/submissions.ts
@@ -1,17 +1,14 @@
-import { Request, Response } from "express";
-import {createSubmission, deleteSubmission, getSubmission} from "../services/submissions.js";
-import { Language, languageMap } from "../entities/content/language.js";
-import {SubmissionDTO} from "../interfaces/submission";
+import { Request, Response } from 'express';
+import { createSubmission, deleteSubmission, getSubmission } from '../services/submissions.js';
+import { Language, languageMap } from '../entities/content/language.js';
+import { SubmissionDTO } from '../interfaces/submission';
 
 interface SubmissionParams {
-    hruid: string,
+    hruid: string;
     id: number;
 }
 
-export async function getSubmissionHandler(
-    req: Request<SubmissionParams>,
-    res: Response,
-): Promise<void> {
+export async function getSubmissionHandler(req: Request<SubmissionParams>, res: Response): Promise<void> {
     const lohruid = req.params.hruid;
     const submissionNumber = +req.params.id;
 
@@ -33,18 +30,19 @@ export async function getSubmissionHandler(
     res.json(submission);
 }
 
-export async function createSubmissionHandler(req: Request, res: Response){
+export async function createSubmissionHandler(req: Request, res: Response) {
     const submissionDTO = req.body as SubmissionDTO;
 
     const submission = await createSubmission(submissionDTO);
 
-    if (!submission)
-        {res.status(404).json({ error: 'Submission not added' });}
-    else
-        {res.json(submission)}
+    if (!submission) {
+        res.status(404).json({ error: 'Submission not added' });
+    } else {
+        res.json(submission);
+    }
 }
 
-export async function deleteSubmissionHandler(req: Request, res: Response){
+export async function deleteSubmissionHandler(req: Request, res: Response) {
     const hruid = req.params.hruid;
     const submissionNumber = +req.params.id;
 
@@ -53,8 +51,9 @@ export async function deleteSubmissionHandler(req: Request, res: Response){
 
     const submission = await deleteSubmission(hruid, lang, version, submissionNumber);
 
-    if (!submission)
-        {res.status(404).json({ error: 'Submission not found' });}
-    else
-        {res.json(submission)}
+    if (!submission) {
+        res.status(404).json({ error: 'Submission not found' });
+    } else {
+        res.json(submission);
+    }
 }
diff --git a/backend/src/controllers/teachers.ts b/backend/src/controllers/teachers.ts
index 02846fd9..52e5e713 100644
--- a/backend/src/controllers/teachers.ts
+++ b/backend/src/controllers/teachers.ts
@@ -1,5 +1,16 @@
 import { Request, Response } from 'express';
-import { createTeacher, deleteTeacher, getAllTeachers, getClassesByTeacher, getClassIdsByTeacher, getQuestionIdsByTeacher, getQuestionsByTeacher, getStudentIdsByTeacher, getStudentsByTeacher, getTeacher } from '../services/teachers.js';
+import {
+    createTeacher,
+    deleteTeacher,
+    getAllTeachers,
+    getClassesByTeacher,
+    getClassIdsByTeacher,
+    getQuestionIdsByTeacher,
+    getQuestionsByTeacher,
+    getStudentIdsByTeacher,
+    getStudentsByTeacher,
+    getTeacher,
+} from '../services/teachers.js';
 import { ClassDTO } from '../interfaces/class.js';
 import { StudentDTO } from '../interfaces/student.js';
 import { QuestionDTO, QuestionId } from '../interfaces/question.js';
@@ -7,17 +18,12 @@ import { Teacher } from '../entities/users/teacher.entity.js';
 import { TeacherDTO } from '../interfaces/teacher.js';
 import { getTeacherRepository } from '../data/repositories.js';
 
-export async function getAllTeachersHandler(
-    req: Request,
-    res: Response,
-): Promise<void> {
+export async function getAllTeachersHandler(req: Request, res: Response): Promise<void> {
     const full = req.query.full === 'true';
 
     const teacherRepository = getTeacherRepository();
 
-    const teachers: TeacherDTO[] | string[] = full
-        ? await getAllTeachers()
-        : await getAllTeachers();
+    const teachers: TeacherDTO[] | string[] = full ? await getAllTeachers() : await getAllTeachers();
 
     if (!teachers) {
         res.status(404).json({ error: `Teacher not found.` });
@@ -27,11 +33,7 @@ export async function getAllTeachersHandler(
     res.status(201).json(teachers);
 }
 
-
-export async function getTeacherHandler(
-    req: Request,
-    res: Response,
-): Promise<void> {
+export async function getTeacherHandler(req: Request, res: Response): Promise<void> {
     const username = req.params.username;
 
     if (!username) {
@@ -51,10 +53,7 @@ export async function getTeacherHandler(
     res.status(201).json(user);
 }
 
-export async function createTeacherHandler(
-    req: Request,
-    res: Response,
-) {
+export async function createTeacherHandler(req: Request, res: Response) {
     const userData = req.body as TeacherDTO;
 
     if (!userData.username || !userData.firstName || !userData.lastName) {
@@ -68,10 +67,7 @@ export async function createTeacherHandler(
     res.status(201).json(newUser);
 }
 
-export async function deleteTeacherHandler(
-    req: Request,
-    res: Response,
-) {
+export async function deleteTeacherHandler(req: Request, res: Response) {
     const username = req.params.username;
 
     if (!username) {
@@ -90,11 +86,7 @@ export async function deleteTeacherHandler(
     res.status(200).json(deletedUser);
 }
 
-
-export async function getTeacherClassHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getTeacherClassHandler(req: Request, res: Response): Promise<void> {
     try {
         const username = req.params.username as string;
         const full = req.query.full === 'true';
@@ -104,9 +96,7 @@ export async function getTeacherClassHandler(
             return;
         }
 
-        const classes: ClassDTO[] | string[] = full
-            ? await getClassesByTeacher(username)
-            : await getClassIdsByTeacher(username);
+        const classes: ClassDTO[] | string[] = full ? await getClassesByTeacher(username) : await getClassIdsByTeacher(username);
 
         res.status(201).json(classes);
     } catch (error) {
@@ -115,10 +105,7 @@ export async function getTeacherClassHandler(
     }
 }
 
-export async function getTeacherStudentHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getTeacherStudentHandler(req: Request, res: Response): Promise<void> {
     try {
         const username = req.params.username as string;
         const full = req.query.full === 'true';
@@ -128,9 +115,7 @@ export async function getTeacherStudentHandler(
             return;
         }
 
-        const students: StudentDTO[] | string[] = full
-            ? await getStudentsByTeacher(username)
-            : await getStudentIdsByTeacher(username);
+        const students: StudentDTO[] | string[] = full ? await getStudentsByTeacher(username) : await getStudentIdsByTeacher(username);
 
         res.status(201).json(students);
     } catch (error) {
@@ -139,10 +124,7 @@ export async function getTeacherStudentHandler(
     }
 }
 
-export async function getTeacherQuestionHandler(
-    req: Request,
-    res: Response
-): Promise<void> {
+export async function getTeacherQuestionHandler(req: Request, res: Response): Promise<void> {
     try {
         const username = req.params.username as string;
         const full = req.query.full === 'true';
@@ -152,9 +134,7 @@ export async function getTeacherQuestionHandler(
             return;
         }
 
-        const questions: QuestionDTO[] | QuestionId[] = full
-            ? await getQuestionsByTeacher(username)
-            : await getQuestionIdsByTeacher(username);
+        const questions: QuestionDTO[] | QuestionId[] = full ? await getQuestionsByTeacher(username) : await getQuestionIdsByTeacher(username);
 
         res.status(201).json(questions);
     } catch (error) {
diff --git a/backend/src/controllers/users.ts b/backend/src/controllers/users.ts
index 8b256a0e..850c6549 100644
--- a/backend/src/controllers/users.ts
+++ b/backend/src/controllers/users.ts
@@ -3,17 +3,11 @@ import { UserService } from '../services/users.js';
 import { UserDTO } from '../interfaces/user.js';
 import { User } from '../entities/users/user.entity.js';
 
-export async function getAllUsersHandler<T extends User>(
-    req: Request,
-    res: Response,
-    service: UserService<T>
-): Promise<void> {
+export async function getAllUsersHandler<T extends User>(req: Request, res: Response, service: UserService<T>): Promise<void> {
     try {
         const full = req.query.full === 'true';
 
-        const users: UserDTO[] | string[] = full
-            ? await service.getAllUsers()
-            : await service.getAllUserIds();
+        const users: UserDTO[] | string[] = full ? await service.getAllUsers() : await service.getAllUserIds();
 
         if (!users) {
             res.status(404).json({ error: `Users not found.` });
@@ -27,11 +21,7 @@ export async function getAllUsersHandler<T extends User>(
     }
 }
 
-export async function getUserHandler<T extends User>(
-    req: Request,
-    res: Response,
-    service: UserService<T>
-): Promise<void> {
+export async function getUserHandler<T extends User>(req: Request, res: Response, service: UserService<T>): Promise<void> {
     try {
         const username = req.params.username as string;
 
@@ -56,12 +46,7 @@ export async function getUserHandler<T extends User>(
     }
 }
 
-export async function createUserHandler<T extends User>(
-    req: Request,
-    res: Response,
-    service: UserService<T>,
-    UserClass: new () => T
-) {
+export async function createUserHandler<T extends User>(req: Request, res: Response, service: UserService<T>, UserClass: new () => T) {
     try {
         console.log('req', req);
         const userData = req.body as UserDTO;
@@ -81,11 +66,7 @@ export async function createUserHandler<T extends User>(
     }
 }
 
-export async function deleteUserHandler<T extends User>(
-    req: Request,
-    res: Response,
-    service: UserService<T>
-) {
+export async function deleteUserHandler<T extends User>(req: Request, res: Response, service: UserService<T>) {
     try {
         const username = req.params.username;
 
diff --git a/backend/src/data/assignments/group-repository.ts b/backend/src/data/assignments/group-repository.ts
index 56736787..eb1b09e2 100644
--- a/backend/src/data/assignments/group-repository.ts
+++ b/backend/src/data/assignments/group-repository.ts
@@ -4,10 +4,7 @@ import { Assignment } from '../../entities/assignments/assignment.entity.js';
 import { Student } from '../../entities/users/student.entity.js';
 
 export class GroupRepository extends DwengoEntityRepository<Group> {
-    public findByAssignmentAndGroupNumber(
-        assignment: Assignment,
-        groupNumber: number
-    ): Promise<Group | null> {
+    public findByAssignmentAndGroupNumber(assignment: Assignment, groupNumber: number): Promise<Group | null> {
         return this.findOne(
             {
                 assignment: assignment,
@@ -16,26 +13,16 @@ export class GroupRepository extends DwengoEntityRepository<Group> {
             { populate: ['members'] }
         );
     }
-    public findAllGroupsForAssignment(
-        assignment: Assignment
-    ): Promise<Group[]> {
+    public findAllGroupsForAssignment(assignment: Assignment): Promise<Group[]> {
         return this.findAll({
             where: { assignment: assignment },
             populate: ['members'],
         });
     }
-    public findAllGroupsWithStudent(
-        student: Student
-    ): Promise<Group[]> {
-        return this.find(
-            { members: student },
-            { populate: ['members'] }
-        )
+    public findAllGroupsWithStudent(student: Student): Promise<Group[]> {
+        return this.find({ members: student }, { populate: ['members'] });
     }
-    public deleteByAssignmentAndGroupNumber(
-        assignment: Assignment,
-        groupNumber: number
-    ) {
+    public deleteByAssignmentAndGroupNumber(assignment: Assignment, groupNumber: number) {
         return this.deleteWhere({
             assignment: assignment,
             groupNumber: groupNumber,
diff --git a/backend/src/data/assignments/submission-repository.ts b/backend/src/data/assignments/submission-repository.ts
index 6ec1217f..251823fa 100644
--- a/backend/src/data/assignments/submission-repository.ts
+++ b/backend/src/data/assignments/submission-repository.ts
@@ -5,10 +5,7 @@ import { LearningObjectIdentifier } from '../../entities/content/learning-object
 import { Student } from '../../entities/users/student.entity.js';
 
 export class SubmissionRepository extends DwengoEntityRepository<Submission> {
-    public findSubmissionByLearningObjectAndSubmissionNumber(
-        loId: LearningObjectIdentifier,
-        submissionNumber: number
-    ): Promise<Submission | null> {
+    public findSubmissionByLearningObjectAndSubmissionNumber(loId: LearningObjectIdentifier, submissionNumber: number): Promise<Submission | null> {
         return this.findOne({
             learningObjectHruid: loId.hruid,
             learningObjectLanguage: loId.language,
@@ -17,10 +14,7 @@ export class SubmissionRepository extends DwengoEntityRepository<Submission> {
         });
     }
 
-    public findMostRecentSubmissionForStudent(
-        loId: LearningObjectIdentifier,
-        submitter: Student
-    ): Promise<Submission | null> {
+    public findMostRecentSubmissionForStudent(loId: LearningObjectIdentifier, submitter: Student): Promise<Submission | null> {
         return this.findOne(
             {
                 learningObjectHruid: loId.hruid,
@@ -32,10 +26,7 @@ export class SubmissionRepository extends DwengoEntityRepository<Submission> {
         );
     }
 
-    public findMostRecentSubmissionForGroup(
-        loId: LearningObjectIdentifier,
-        group: Group
-    ): Promise<Submission | null> {
+    public findMostRecentSubmissionForGroup(loId: LearningObjectIdentifier, group: Group): Promise<Submission | null> {
         return this.findOne(
             {
                 learningObjectHruid: loId.hruid,
@@ -47,26 +38,15 @@ export class SubmissionRepository extends DwengoEntityRepository<Submission> {
         );
     }
 
-    public findAllSubmissionsForGroup(
-        group: Group,
-    ): Promise<Submission[]> {
-        return this.find(
-            { onBehalfOf: group },
-        );
+    public findAllSubmissionsForGroup(group: Group): Promise<Submission[]> {
+        return this.find({ onBehalfOf: group });
     }
 
-    public findAllSubmissionsForStudent(
-        student: Student,
-    ): Promise<Submission[]> {
-        return this.find(
-            { submitter: student },
-        );
+    public findAllSubmissionsForStudent(student: Student): Promise<Submission[]> {
+        return this.find({ submitter: student });
     }
 
-    public deleteSubmissionByLearningObjectAndSubmissionNumber(
-        loId: LearningObjectIdentifier,
-        submissionNumber: number
-    ): Promise<void> {
+    public deleteSubmissionByLearningObjectAndSubmissionNumber(loId: LearningObjectIdentifier, submissionNumber: number): Promise<void> {
         return this.deleteWhere({
             learningObjectHruid: loId.hruid,
             learningObjectLanguage: loId.language,
diff --git a/backend/src/data/classes/class-repository.ts b/backend/src/data/classes/class-repository.ts
index 4f2f5b0e..0ceed98e 100644
--- a/backend/src/data/classes/class-repository.ts
+++ b/backend/src/data/classes/class-repository.ts
@@ -5,10 +5,7 @@ import { Teacher } from '../../entities/users/teacher.entity';
 
 export class ClassRepository extends DwengoEntityRepository<Class> {
     public findById(id: string): Promise<Class | null> {
-        return this.findOne(
-            { classId: id },
-            { populate: ['students', 'teachers'] }
-        );
+        return this.findOne({ classId: id }, { populate: ['students', 'teachers'] });
     }
     public deleteById(id: string): Promise<void> {
         return this.deleteWhere({ classId: id });
@@ -21,9 +18,6 @@ export class ClassRepository extends DwengoEntityRepository<Class> {
     }
 
     public findByTeacher(teacher: Teacher): Promise<Class[]> {
-        return this.find(
-            { teachers: teacher },
-            { populate: ['students', 'teachers'] }
-        );
+        return this.find({ teachers: teacher }, { populate: ['students', 'teachers'] });
     }
 }
diff --git a/backend/src/data/questions/answer-repository.ts b/backend/src/data/questions/answer-repository.ts
index 0e20e479..a28342bd 100644
--- a/backend/src/data/questions/answer-repository.ts
+++ b/backend/src/data/questions/answer-repository.ts
@@ -19,10 +19,7 @@ export class AnswerRepository extends DwengoEntityRepository<Answer> {
             orderBy: { sequenceNumber: 'ASC' },
         });
     }
-    public removeAnswerByQuestionAndSequenceNumber(
-        question: Question,
-        sequenceNumber: number
-    ): Promise<void> {
+    public removeAnswerByQuestionAndSequenceNumber(question: Question, sequenceNumber: number): Promise<void> {
         return this.deleteWhere({
             toQuestion: question,
             sequenceNumber: sequenceNumber,
diff --git a/backend/src/data/questions/question-repository.ts b/backend/src/data/questions/question-repository.ts
index e24d48b8..9207e1dd 100644
--- a/backend/src/data/questions/question-repository.ts
+++ b/backend/src/data/questions/question-repository.ts
@@ -21,9 +21,7 @@ export class QuestionRepository extends DwengoEntityRepository<Question> {
         questionEntity.content = question.content;
         return this.insert(questionEntity);
     }
-    public findAllQuestionsAboutLearningObject(
-        loId: LearningObjectIdentifier
-    ): Promise<Question[]> {
+    public findAllQuestionsAboutLearningObject(loId: LearningObjectIdentifier): Promise<Question[]> {
         return this.findAll({
             where: {
                 learningObjectHruid: loId.hruid,
@@ -35,10 +33,7 @@ export class QuestionRepository extends DwengoEntityRepository<Question> {
             },
         });
     }
-    public removeQuestionByLearningObjectAndSequenceNumber(
-        loId: LearningObjectIdentifier,
-        sequenceNumber: number
-    ): Promise<void> {
+    public removeQuestionByLearningObjectAndSequenceNumber(loId: LearningObjectIdentifier, sequenceNumber: number): Promise<void> {
         return this.deleteWhere({
             learningObjectHruid: loId.hruid,
             learningObjectLanguage: loId.language,
@@ -47,14 +42,12 @@ export class QuestionRepository extends DwengoEntityRepository<Question> {
         });
     }
 
-    public async findAllByLearningObjects(
-        learningObjects: LearningObject[]
-    ): Promise<Question[]> {
+    public async findAllByLearningObjects(learningObjects: LearningObject[]): Promise<Question[]> {
         const objectIdentifiers = learningObjects.map((lo) => ({
-                learningObjectHruid: lo.hruid,
-                learningObjectLanguage: lo.language,
-                learningObjectVersion: lo.version,
-            }));
+            learningObjectHruid: lo.hruid,
+            learningObjectLanguage: lo.language,
+            learningObjectVersion: lo.version,
+        }));
 
         return this.findAll({
             where: { $or: objectIdentifiers },
diff --git a/backend/src/data/repositories.ts b/backend/src/data/repositories.ts
index 0c091aa9..02385109 100644
--- a/backend/src/data/repositories.ts
+++ b/backend/src/data/repositories.ts
@@ -40,9 +40,7 @@ export function transactional<T>(f: () => Promise<T>) {
     entityManager?.transactional(f);
 }
 
-function repositoryGetter<T extends AnyEntity, R extends EntityRepository<T>>(
-    entity: EntityName<T>
-): () => R {
+function repositoryGetter<T extends AnyEntity, R extends EntityRepository<T>>(entity: EntityName<T>): () => R {
     let cachedRepo: R | undefined;
     return (): R => {
         if (!cachedRepo) {
diff --git a/backend/src/data/users/student-repository.ts b/backend/src/data/users/student-repository.ts
index f3cf7b6a..0792678d 100644
--- a/backend/src/data/users/student-repository.ts
+++ b/backend/src/data/users/student-repository.ts
@@ -12,4 +12,4 @@ export class StudentRepository extends DwengoEntityRepository<Student> {
     public deleteByUsername(username: string): Promise<void> {
         return this.deleteWhere({ username: username });
     }
-}
\ No newline at end of file
+}
diff --git a/backend/src/data/users/teacher-repository.ts b/backend/src/data/users/teacher-repository.ts
index 23ba559e..2b2bee75 100644
--- a/backend/src/data/users/teacher-repository.ts
+++ b/backend/src/data/users/teacher-repository.ts
@@ -9,4 +9,4 @@ export class TeacherRepository extends DwengoEntityRepository<Teacher> {
     public deleteByUsername(username: string): Promise<void> {
         return this.deleteWhere({ username: username });
     }
-}
\ No newline at end of file
+}
diff --git a/backend/src/entities/assignments/assignment.entity.ts b/backend/src/entities/assignments/assignment.entity.ts
index a1f53386..692e2112 100644
--- a/backend/src/entities/assignments/assignment.entity.ts
+++ b/backend/src/entities/assignments/assignment.entity.ts
@@ -1,12 +1,4 @@
-import {
-    Collection,
-    Entity,
-    Enum,
-    ManyToOne,
-    OneToMany,
-    PrimaryKey,
-    Property,
-} from '@mikro-orm/core';
+import { Collection, Entity, Enum, ManyToOne, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
 import { Class } from '../classes/class.entity.js';
 import { Group } from './group.entity.js';
 import { Language } from '../content/language.js';
diff --git a/backend/src/entities/classes/class.entity.ts b/backend/src/entities/classes/class.entity.ts
index a484deff..63315304 100644
--- a/backend/src/entities/classes/class.entity.ts
+++ b/backend/src/entities/classes/class.entity.ts
@@ -1,10 +1,4 @@
-import {
-    Collection,
-    Entity,
-    ManyToMany,
-    PrimaryKey,
-    Property,
-} from '@mikro-orm/core';
+import { Collection, Entity, ManyToMany, PrimaryKey, Property } from '@mikro-orm/core';
 import { v4 } from 'uuid';
 import { Teacher } from '../users/teacher.entity.js';
 import { Student } from '../users/student.entity.js';
diff --git a/backend/src/entities/content/language.ts b/backend/src/entities/content/language.ts
index 40a00919..7e7b42d2 100644
--- a/backend/src/entities/content/language.ts
+++ b/backend/src/entities/content/language.ts
@@ -190,4 +190,4 @@ export const languageMap: Record<string, Language> = {
     fr: Language.French,
     en: Language.English,
     de: Language.German,
-};
\ No newline at end of file
+};
diff --git a/backend/src/entities/content/learning-object.entity.ts b/backend/src/entities/content/learning-object.entity.ts
index 4a3641bb..9eda22ba 100644
--- a/backend/src/entities/content/learning-object.entity.ts
+++ b/backend/src/entities/content/learning-object.entity.ts
@@ -1,13 +1,4 @@
-import {
-    Embeddable,
-    Embedded,
-    Entity,
-    Enum,
-    ManyToMany,
-    OneToMany,
-    PrimaryKey,
-    Property,
-} from '@mikro-orm/core';
+import { Embeddable, Embedded, Entity, Enum, ManyToMany, OneToMany, PrimaryKey, Property } from '@mikro-orm/core';
 import { Language } from './language.js';
 import { Attachment } from './attachment.entity.js';
 import { Teacher } from '../users/teacher.entity.js';
diff --git a/backend/src/interfaces/answer.ts b/backend/src/interfaces/answer.ts
index 0b86a4d1..493fd3c0 100644
--- a/backend/src/interfaces/answer.ts
+++ b/backend/src/interfaces/answer.ts
@@ -1,6 +1,6 @@
-import {mapToUserDTO, UserDTO} from "./user.js";
-import {mapToQuestionDTO, mapToQuestionId, QuestionDTO, QuestionId} from "./question.js";
-import {Answer} from "../entities/questions/answer.entity.js";
+import { mapToUserDTO, UserDTO } from './user.js';
+import { mapToQuestionDTO, mapToQuestionId, QuestionDTO, QuestionId } from './question.js';
+import { Answer } from '../entities/questions/answer.entity.js';
 
 export interface AnswerDTO {
     author: UserDTO;
@@ -33,6 +33,6 @@ export function mapToAnswerId(answer: AnswerDTO): AnswerId {
     return {
         author: answer.author.username,
         toQuestion: mapToQuestionId(answer.toQuestion),
-        sequenceNumber: answer.sequenceNumber
-    }
+        sequenceNumber: answer.sequenceNumber,
+    };
 }
diff --git a/backend/src/interfaces/class.ts b/backend/src/interfaces/class.ts
index e04ce2d4..371e3cae 100644
--- a/backend/src/interfaces/class.ts
+++ b/backend/src/interfaces/class.ts
@@ -27,15 +27,11 @@ export function mapToClassDTO(cls: Class): ClassDTO {
     };
 }
 
-export function mapToClass(
-    classData: ClassDTO, 
-    students: Collection<Student>, 
-    teachers: Collection<Teacher>
-): Class {
+export function mapToClass(classData: ClassDTO, students: Collection<Student>, teachers: Collection<Teacher>): Class {
     const cls = new Class();
     cls.displayName = classData.displayName;
     cls.students = students;
     cls.teachers = teachers;
-    
+
     return cls;
 }
diff --git a/backend/src/interfaces/question.ts b/backend/src/interfaces/question.ts
index 69039ee9..8cca42f6 100644
--- a/backend/src/interfaces/question.ts
+++ b/backend/src/interfaces/question.ts
@@ -1,6 +1,6 @@
 import { Question } from '../entities/questions/question.entity.js';
-import {UserDTO} from "./user.js";
-import {LearningObjectIdentifier} from "../entities/content/learning-object-identifier.js";
+import { UserDTO } from './user.js';
+import { LearningObjectIdentifier } from '../entities/content/learning-object-identifier.js';
 import { mapToStudentDTO, StudentDTO } from './student.js';
 import { TeacherDTO } from './teacher.js';
 
@@ -19,8 +19,8 @@ export function mapToQuestionDTO(question: Question): QuestionDTO {
     const learningObjectIdentifier = {
         hruid: question.learningObjectHruid,
         language: question.learningObjectLanguage,
-        version: question.learningObjectVersion
-    }
+        version: question.learningObjectVersion,
+    };
 
     return {
         learningObjectIdentifier,
@@ -42,4 +42,3 @@ export function mapToQuestionId(question: QuestionDTO): QuestionId {
         sequenceNumber: question.sequenceNumber!,
     };
 }
-
diff --git a/backend/src/interfaces/student.ts b/backend/src/interfaces/student.ts
index 9790eb35..079b355b 100644
--- a/backend/src/interfaces/student.ts
+++ b/backend/src/interfaces/student.ts
@@ -23,11 +23,7 @@ export function mapToStudentDTO(student: Student): StudentDTO {
 }
 
 export function mapToStudent(studentData: StudentDTO): Student {
-    const student = new Student(
-        studentData.username,
-        studentData.firstName,
-        studentData.lastName,
-    );
+    const student = new Student(studentData.username, studentData.firstName, studentData.lastName);
 
     return student;
 }
diff --git a/backend/src/interfaces/submission.ts b/backend/src/interfaces/submission.ts
index 40b76fad..fbaf520d 100644
--- a/backend/src/interfaces/submission.ts
+++ b/backend/src/interfaces/submission.ts
@@ -1,20 +1,20 @@
-import { Submission } from "../entities/assignments/submission.entity.js";
-import { Language } from "../entities/content/language.js";
-import { GroupDTO, mapToGroupDTO } from "./group.js";
-import {mapToStudent, mapToStudentDTO, StudentDTO} from "./student.js";
-import {mapToUser} from "./user";
-import {Student} from "../entities/users/student.entity";
+import { Submission } from '../entities/assignments/submission.entity.js';
+import { Language } from '../entities/content/language.js';
+import { GroupDTO, mapToGroupDTO } from './group.js';
+import { mapToStudent, mapToStudentDTO, StudentDTO } from './student.js';
+import { mapToUser } from './user';
+import { Student } from '../entities/users/student.entity';
 
 export interface SubmissionDTO {
-    learningObjectHruid: string,
-    learningObjectLanguage: Language,
-    learningObjectVersion: number,
+    learningObjectHruid: string;
+    learningObjectLanguage: Language;
+    learningObjectVersion: number;
 
-    submissionNumber?: number,
-    submitter: StudentDTO,
-    time?: Date,
-    group?: GroupDTO,
-    content: string,
+    submissionNumber?: number;
+    submitter: StudentDTO;
+    time?: Date;
+    group?: GroupDTO;
+    content: string;
 }
 
 export function mapToSubmissionDTO(submission: Submission): SubmissionDTO {
@@ -28,7 +28,7 @@ export function mapToSubmissionDTO(submission: Submission): SubmissionDTO {
         time: submission.submissionTime,
         group: submission.onBehalfOf ? mapToGroupDTO(submission.onBehalfOf) : undefined,
         content: submission.content,
-    }
+    };
 }
 
 export function mapToSubmission(submissionDTO: SubmissionDTO): Submission {
@@ -37,7 +37,7 @@ export function mapToSubmission(submissionDTO: SubmissionDTO): Submission {
     submission.learningObjectLanguage = submissionDTO.learningObjectLanguage;
     submission.learningObjectVersion = submissionDTO.learningObjectVersion;
     // Submission.submissionNumber = submissionDTO.submissionNumber;
-    submission.submitter = mapToStudent(submissionDTO.submitter) ;
+    submission.submitter = mapToStudent(submissionDTO.submitter);
     // Submission.submissionTime = submissionDTO.time;
     // Submission.onBehalfOf =  submissionDTO.group!;
     // TODO fix group
diff --git a/backend/src/interfaces/teacher-invitation.ts b/backend/src/interfaces/teacher-invitation.ts
index d29e7476..cddef566 100644
--- a/backend/src/interfaces/teacher-invitation.ts
+++ b/backend/src/interfaces/teacher-invitation.ts
@@ -8,9 +8,7 @@ export interface TeacherInvitationDTO {
     class: string | ClassDTO;
 }
 
-export function mapToTeacherInvitationDTO(
-    invitation: TeacherInvitation
-): TeacherInvitationDTO {
+export function mapToTeacherInvitationDTO(invitation: TeacherInvitation): TeacherInvitationDTO {
     return {
         sender: mapToUserDTO(invitation.sender),
         receiver: mapToUserDTO(invitation.receiver),
@@ -18,9 +16,7 @@ export function mapToTeacherInvitationDTO(
     };
 }
 
-export function mapToTeacherInvitationDTOIds(
-    invitation: TeacherInvitation
-): TeacherInvitationDTO {
+export function mapToTeacherInvitationDTOIds(invitation: TeacherInvitation): TeacherInvitationDTO {
     return {
         sender: invitation.sender.username,
         receiver: invitation.receiver.username,
diff --git a/backend/src/interfaces/teacher.ts b/backend/src/interfaces/teacher.ts
index 93dbf5fd..4dd6adb4 100644
--- a/backend/src/interfaces/teacher.ts
+++ b/backend/src/interfaces/teacher.ts
@@ -23,11 +23,7 @@ export function mapToTeacherDTO(teacher: Teacher): TeacherDTO {
 }
 
 export function mapToTeacher(TeacherData: TeacherDTO): Teacher {
-    const teacher = new Teacher(
-        TeacherData.username,
-        TeacherData.firstName,
-        TeacherData.lastName,
-    );
+    const teacher = new Teacher(TeacherData.username, TeacherData.firstName, TeacherData.lastName);
 
     return teacher;
 }
diff --git a/backend/src/interfaces/user.ts b/backend/src/interfaces/user.ts
index 64081d48..58f0dd5a 100644
--- a/backend/src/interfaces/user.ts
+++ b/backend/src/interfaces/user.ts
@@ -22,10 +22,7 @@ export function mapToUserDTO(user: User): UserDTO {
     };
 }
 
-export function mapToUser<T extends User>(
-    userData: UserDTO,
-    userInstance: T
-): T {
+export function mapToUser<T extends User>(userData: UserDTO, userInstance: T): T {
     userInstance.username = userData.username;
     userInstance.firstName = userData.firstName;
     userInstance.lastName = userData.lastName;
diff --git a/backend/src/routes/learning-objects.ts b/backend/src/routes/learning-objects.ts
index 45e0df4c..7532765b 100644
--- a/backend/src/routes/learning-objects.ts
+++ b/backend/src/routes/learning-objects.ts
@@ -1,15 +1,9 @@
 import express from 'express';
-import {
-    getAllLearningObjects,
-    getAttachment,
-    getLearningObject,
-    getLearningObjectHTML,
-} from '../controllers/learning-objects.js';
+import { getAllLearningObjects, getAttachment, getLearningObject, getLearningObjectHTML } from '../controllers/learning-objects.js';
 
 import submissionRoutes from './submissions.js';
 import questionRoutes from './questions.js';
 
-
 const router = express.Router();
 
 // DWENGO learning objects
@@ -32,7 +26,7 @@ router.get('/:hruid', getLearningObject);
 
 router.use('/:hruid/submissions', submissionRoutes);
 
-router.use('/:hruid/:version/questions', questionRoutes)
+router.use('/:hruid/:version/questions', questionRoutes);
 
 // Parameter: hruid of learning object
 // Query: language, version (optional)
diff --git a/backend/src/routes/questions.ts b/backend/src/routes/questions.ts
index d9a4dd9d..31a71f3b 100644
--- a/backend/src/routes/questions.ts
+++ b/backend/src/routes/questions.ts
@@ -1,10 +1,11 @@
 import express from 'express';
 import {
-    createQuestionHandler, deleteQuestionHandler,
+    createQuestionHandler,
+    deleteQuestionHandler,
     getAllQuestionsHandler,
     getQuestionAnswersHandler,
-    getQuestionHandler
-} from "../controllers/questions.js";
+    getQuestionHandler,
+} from '../controllers/questions.js';
 const router = express.Router({ mergeParams: true });
 
 // Query language
diff --git a/backend/src/routes/submissions.ts b/backend/src/routes/submissions.ts
index e431260f..4db93027 100644
--- a/backend/src/routes/submissions.ts
+++ b/backend/src/routes/submissions.ts
@@ -1,9 +1,7 @@
 import express from 'express';
-import {createSubmissionHandler, deleteSubmissionHandler, getSubmissionHandler} from '../controllers/submissions.js';
+import { createSubmissionHandler, deleteSubmissionHandler, getSubmissionHandler } from '../controllers/submissions.js';
 const router = express.Router({ mergeParams: true });
 
-
-
 // Root endpoint used to search objects
 router.get('/', (req, res) => {
     res.json({
diff --git a/backend/src/services/assignments.ts b/backend/src/services/assignments.ts
index e67c2c0c..be121810 100644
--- a/backend/src/services/assignments.ts
+++ b/backend/src/services/assignments.ts
@@ -1,22 +1,9 @@
-import {
-    getAssignmentRepository,
-    getClassRepository,
-    getGroupRepository,
-    getSubmissionRepository,
-} from '../data/repositories.js';
+import { getAssignmentRepository, getClassRepository, getGroupRepository, getSubmissionRepository } from '../data/repositories.js';
 import { Assignment } from '../entities/assignments/assignment.entity.js';
-import {
-    AssignmentDTO,
-    mapToAssignment,
-    mapToAssignmentDTO,
-    mapToAssignmentDTOId,
-} from '../interfaces/assignment.js';
+import { AssignmentDTO, mapToAssignment, mapToAssignmentDTO, mapToAssignmentDTOId } from '../interfaces/assignment.js';
 import { mapToSubmissionDTO, SubmissionDTO } from '../interfaces/submission.js';
 
-export async function getAllAssignments(
-    classid: string,
-    full: boolean
-): Promise<AssignmentDTO[]> {
+export async function getAllAssignments(classid: string, full: boolean): Promise<AssignmentDTO[]> {
     const classRepository = getClassRepository();
     const cls = await classRepository.findById(classid);
 
@@ -25,8 +12,7 @@ export async function getAllAssignments(
     }
 
     const assignmentRepository = getAssignmentRepository();
-    const assignments =
-        await assignmentRepository.findAllAssignmentsInClass(cls);
+    const assignments = await assignmentRepository.findAllAssignmentsInClass(cls);
 
     if (full) {
         return assignments.map(mapToAssignmentDTO);
@@ -35,14 +21,11 @@ export async function getAllAssignments(
     return assignments.map(mapToAssignmentDTOId);
 }
 
-export async function createAssignment(
-    classid: string,
-    assignmentData: AssignmentDTO,
-): Promise<Assignment | null> {
+export async function createAssignment(classid: string, assignmentData: AssignmentDTO): Promise<Assignment | null> {
     const classRepository = getClassRepository();
     const cls = await classRepository.findById(classid);
 
-    if  (!cls) {
+    if (!cls) {
         return null;
     }
 
@@ -54,16 +37,12 @@ export async function createAssignment(
         await assignmentRepository.save(newAssignment);
 
         return newAssignment;
-    } catch(e) {
+    } catch (e) {
         return null;
     }
-
 }
 
-export async function getAssignment(
-    classid: string,
-    id: number
-): Promise<AssignmentDTO | null> {
+export async function getAssignment(classid: string, id: number): Promise<AssignmentDTO | null> {
     const classRepository = getClassRepository();
     const cls = await classRepository.findById(classid);
 
@@ -81,10 +60,7 @@ export async function getAssignment(
     return mapToAssignmentDTO(assignment);
 }
 
-export async function getAssignmentsSubmissions(
-    classid: string,
-    assignmentNumber: number,
-): Promise<SubmissionDTO[]> {
+export async function getAssignmentsSubmissions(classid: string, assignmentNumber: number): Promise<SubmissionDTO[]> {
     const classRepository = getClassRepository();
     const cls = await classRepository.findById(classid);
 
@@ -103,8 +79,7 @@ export async function getAssignmentsSubmissions(
     const groups = await groupRepository.findAllGroupsForAssignment(assignment);
 
     const submissionRepository = getSubmissionRepository();
-    const submissions = 
-        (await Promise.all(groups.map(group => submissionRepository.findAllSubmissionsForGroup(group)))).flat();
+    const submissions = (await Promise.all(groups.map((group) => submissionRepository.findAllSubmissionsForGroup(group)))).flat();
 
     return submissions.map(mapToSubmissionDTO);
-}
\ No newline at end of file
+}
diff --git a/backend/src/services/class.ts b/backend/src/services/class.ts
index 4b76d0cd..46530327 100644
--- a/backend/src/services/class.ts
+++ b/backend/src/services/class.ts
@@ -1,26 +1,12 @@
-import {
-    getClassRepository,
-    getStudentRepository,
-    getTeacherInvitationRepository,
-    getTeacherRepository,
-} from '../data/repositories.js';
+import { getClassRepository, getStudentRepository, getTeacherInvitationRepository, getTeacherRepository } from '../data/repositories.js';
 import { Class } from '../entities/classes/class.entity.js';
 import { ClassDTO, mapToClassDTO } from '../interfaces/class.js';
 import { mapToStudentDTO, StudentDTO } from '../interfaces/student.js';
-import {
-    mapToTeacherInvitationDTO,
-    mapToTeacherInvitationDTOIds,
-    TeacherInvitationDTO,
-} from '../interfaces/teacher-invitation.js';
+import { mapToTeacherInvitationDTO, mapToTeacherInvitationDTOIds, TeacherInvitationDTO } from '../interfaces/teacher-invitation.js';
 
-export async function getAllClasses(
-    full: boolean
-): Promise<ClassDTO[] | string[]> {
+export async function getAllClasses(full: boolean): Promise<ClassDTO[] | string[]> {
     const classRepository = getClassRepository();
-    const classes = await classRepository.find(
-        {},
-        { populate: ['students', 'teachers'] }
-    );
+    const classes = await classRepository.find({}, { populate: ['students', 'teachers'] });
 
     if (!classes) {
         return [];
@@ -35,13 +21,11 @@ export async function getAllClasses(
 export async function createClass(classData: ClassDTO): Promise<Class | null> {
     const teacherRepository = getTeacherRepository();
     const teacherUsernames = classData.teachers || [];
-    const teachers = (await Promise.all(teacherUsernames.map(id => teacherRepository.findByUsername(id))))
-        .filter(teacher => teacher != null);
+    const teachers = (await Promise.all(teacherUsernames.map((id) => teacherRepository.findByUsername(id)))).filter((teacher) => teacher != null);
 
     const studentRepository = getStudentRepository();
     const studentUsernames = classData.students || [];
-    const students = (await Promise.all(studentUsernames.map(id => studentRepository.findByUsername(id))))
-        .filter(student => student != null);
+    const students = (await Promise.all(studentUsernames.map((id) => studentRepository.findByUsername(id)))).filter((student) => student != null);
 
     //Const cls = mapToClass(classData, teachers, students);
 
@@ -56,7 +40,7 @@ export async function createClass(classData: ClassDTO): Promise<Class | null> {
         await classRepository.save(newClass);
 
         return newClass;
-    } catch(e) {
+    } catch (e) {
         return null;
     }
 }
@@ -92,10 +76,7 @@ export async function getClassStudentsIds(classId: string): Promise<string[]> {
     return students.map((student) => student.username);
 }
 
-export async function getClassTeacherInvitations(
-    classId: string,
-    full: boolean
-): Promise<TeacherInvitationDTO[]> {
+export async function getClassTeacherInvitations(classId: string, full: boolean): Promise<TeacherInvitationDTO[]> {
     const classRepository = getClassRepository();
     const cls = await classRepository.findById(classId);
 
@@ -104,8 +85,7 @@ export async function getClassTeacherInvitations(
     }
 
     const teacherInvitationRepository = getTeacherInvitationRepository();
-    const invitations =
-        await teacherInvitationRepository.findAllInvitationsForClass(cls);
+    const invitations = await teacherInvitationRepository.findAllInvitationsForClass(cls);
 
     if (full) {
         return invitations.map(mapToTeacherInvitationDTO);
diff --git a/backend/src/services/groups.ts b/backend/src/services/groups.ts
index 2f2d0a14..91091703 100644
--- a/backend/src/services/groups.ts
+++ b/backend/src/services/groups.ts
@@ -7,19 +7,10 @@ import {
     getSubmissionRepository,
 } from '../data/repositories.js';
 import { Group } from '../entities/assignments/group.entity.js';
-import {
-    GroupDTO,
-    mapToGroupDTO,
-    mapToGroupDTOId,
-} from '../interfaces/group.js';
+import { GroupDTO, mapToGroupDTO, mapToGroupDTOId } from '../interfaces/group.js';
 import { mapToSubmissionDTO, SubmissionDTO } from '../interfaces/submission.js';
 
-export async function getGroup(
-    classId: string,
-    assignmentNumber: number,
-    groupNumber: number,
-    full: boolean
-): Promise<GroupDTO | null> {
+export async function getGroup(classId: string, assignmentNumber: number, groupNumber: number, full: boolean): Promise<GroupDTO | null> {
     const classRepository = getClassRepository();
     const cls = await classRepository.findById(classId);
 
@@ -28,20 +19,14 @@ export async function getGroup(
     }
 
     const assignmentRepository = getAssignmentRepository();
-    const assignment = await assignmentRepository.findByClassAndId(
-        cls,
-        assignmentNumber
-    );
+    const assignment = await assignmentRepository.findByClassAndId(cls, assignmentNumber);
 
     if (!assignment) {
         return null;
     }
 
     const groupRepository = getGroupRepository();
-    const group = await groupRepository.findByAssignmentAndGroupNumber(
-        assignment,
-        groupNumber
-    );
+    const group = await groupRepository.findByAssignmentAndGroupNumber(assignment, groupNumber);
 
     if (!group) {
         return null;
@@ -54,16 +39,11 @@ export async function getGroup(
     return mapToGroupDTOId(group);
 }
 
-export async function createGroup(
-    groupData: GroupDTO,
-    classid: string,
-    assignmentNumber: number,
-): Promise<Group | null> {
+export async function createGroup(groupData: GroupDTO, classid: string, assignmentNumber: number): Promise<Group | null> {
     const studentRepository = getStudentRepository();
 
-    const memberUsernames = groupData.members as string[] || []; // TODO check if groupdata.members is a list
-    const members = (await Promise.all([...memberUsernames].map(id => studentRepository.findByUsername(id))))
-        .filter(student => student != null);
+    const memberUsernames = (groupData.members as string[]) || []; // TODO check if groupdata.members is a list
+    const members = (await Promise.all([...memberUsernames].map((id) => studentRepository.findByUsername(id)))).filter((student) => student != null);
 
     console.log(members);
 
@@ -90,17 +70,13 @@ export async function createGroup(
         await groupRepository.save(newGroup);
 
         return newGroup;
-    } catch(e) {
+    } catch (e) {
         console.log(e);
         return null;
     }
 }
 
-export async function getAllGroups(
-    classId: string,
-    assignmentNumber: number,
-    full: boolean
-): Promise<GroupDTO[]> {
+export async function getAllGroups(classId: string, assignmentNumber: number, full: boolean): Promise<GroupDTO[]> {
     const classRepository = getClassRepository();
     const cls = await classRepository.findById(classId);
 
@@ -109,10 +85,7 @@ export async function getAllGroups(
     }
 
     const assignmentRepository = getAssignmentRepository();
-    const assignment = await assignmentRepository.findByClassAndId(
-        cls,
-        assignmentNumber
-    );
+    const assignment = await assignmentRepository.findByClassAndId(cls, assignmentNumber);
 
     if (!assignment) {
         return [];
@@ -130,11 +103,7 @@ export async function getAllGroups(
     return groups.map(mapToGroupDTOId);
 }
 
-export async function getGroupSubmissions(
-    classId: string,
-    assignmentNumber: number,
-    groupNumber: number,
-): Promise<SubmissionDTO[]> {
+export async function getGroupSubmissions(classId: string, assignmentNumber: number, groupNumber: number): Promise<SubmissionDTO[]> {
     const classRepository = getClassRepository();
     const cls = await classRepository.findById(classId);
 
@@ -143,20 +112,14 @@ export async function getGroupSubmissions(
     }
 
     const assignmentRepository = getAssignmentRepository();
-    const assignment = await assignmentRepository.findByClassAndId(
-        cls,
-        assignmentNumber
-    );
+    const assignment = await assignmentRepository.findByClassAndId(cls, assignmentNumber);
 
     if (!assignment) {
         return [];
     }
 
     const groupRepository = getGroupRepository();
-    const group = await groupRepository.findByAssignmentAndGroupNumber(
-        assignment,
-        groupNumber
-    );
+    const group = await groupRepository.findByAssignmentAndGroupNumber(assignment, groupNumber);
 
     if (!group) {
         return [];
diff --git a/backend/src/services/learning-objects.ts b/backend/src/services/learning-objects.ts
index dfde4da7..fb579471 100644
--- a/backend/src/services/learning-objects.ts
+++ b/backend/src/services/learning-objects.ts
@@ -1,16 +1,8 @@
 import { DWENGO_API_BASE } from '../config.js';
 import { fetchWithLogging } from '../util/api-helper.js';
-import {
-    FilteredLearningObject,
-    LearningObjectMetadata,
-    LearningObjectNode,
-    LearningPathResponse,
-} from '../interfaces/learning-content.js';
+import { FilteredLearningObject, LearningObjectMetadata, LearningObjectNode, LearningPathResponse } from '../interfaces/learning-content.js';
 
-function filterData(
-    data: LearningObjectMetadata,
-    htmlUrl: string
-): FilteredLearningObject {
+function filterData(data: LearningObjectMetadata, htmlUrl: string): FilteredLearningObject {
     return {
         key: data.hruid, // Hruid learningObject (not path)
         _id: data._id,
@@ -37,10 +29,7 @@ function filterData(
 /**
  * Fetches a single learning object by its HRUID
  */
-export async function getLearningObjectById(
-    hruid: string,
-    language: string
-): Promise<FilteredLearningObject | null> {
+export async function getLearningObjectById(hruid: string, language: string): Promise<FilteredLearningObject | null> {
     const metadataUrl = `${DWENGO_API_BASE}/learningObject/getMetadata?hruid=${hruid}&language=${language}`;
     const metadata = await fetchWithLogging<LearningObjectMetadata>(
         metadataUrl,
@@ -59,26 +48,12 @@ export async function getLearningObjectById(
 /**
  * Generic function to fetch learning objects (full data or just HRUIDs)
  */
-async function fetchLearningObjects(
-    hruid: string,
-    full: boolean,
-    language: string
-): Promise<FilteredLearningObject[] | string[]> {
+async function fetchLearningObjects(hruid: string, full: boolean, language: string): Promise<FilteredLearningObject[] | string[]> {
     try {
-        const learningPathResponse: LearningPathResponse =
-            await fetchLearningPaths(
-                [hruid],
-                language,
-                `Learning path for HRUID "${hruid}"`
-            );
+        const learningPathResponse: LearningPathResponse = await fetchLearningPaths([hruid], language, `Learning path for HRUID "${hruid}"`);
 
-        if (
-            !learningPathResponse.success ||
-            !learningPathResponse.data?.length
-        ) {
-            console.error(
-                `⚠️ WARNING: Learning path "${hruid}" exists but contains no learning objects.`
-            );
+        if (!learningPathResponse.success || !learningPathResponse.data?.length) {
+            console.error(`⚠️ WARNING: Learning path "${hruid}" exists but contains no learning objects.`);
             return [];
         }
 
@@ -88,12 +63,9 @@ async function fetchLearningObjects(
             return nodes.map((node) => node.learningobject_hruid);
         }
 
-        return await Promise.all(
-            nodes.map(async (node) => getLearningObjectById(
-                    node.learningobject_hruid,
-                    language
-                ))
-        ).then((objects) => objects.filter((obj): obj is FilteredLearningObject => obj !== null));
+        return await Promise.all(nodes.map(async (node) => getLearningObjectById(node.learningobject_hruid, language))).then((objects) =>
+            objects.filter((obj): obj is FilteredLearningObject => obj !== null)
+        );
     } catch (error) {
         console.error('❌ Error fetching learning objects:', error);
         return [];
@@ -103,27 +75,16 @@ async function fetchLearningObjects(
 /**
  * Fetch full learning object data (metadata)
  */
-export async function getLearningObjectsFromPath(
-    hruid: string,
-    language: string
-): Promise<FilteredLearningObject[]> {
-    return (await fetchLearningObjects(
-        hruid,
-        true,
-        language
-    )) as FilteredLearningObject[];
+export async function getLearningObjectsFromPath(hruid: string, language: string): Promise<FilteredLearningObject[]> {
+    return (await fetchLearningObjects(hruid, true, language)) as FilteredLearningObject[];
 }
 
 /**
  * Fetch only learning object HRUIDs
  */
-export async function getLearningObjectIdsFromPath(
-    hruid: string,
-    language: string
-): Promise<string[]> {
+export async function getLearningObjectIdsFromPath(hruid: string, language: string): Promise<string[]> {
     return (await fetchLearningObjects(hruid, false, language)) as string[];
 }
 function fetchLearningPaths(arg0: string[], language: string, arg2: string): LearningPathResponse | PromiseLike<LearningPathResponse> {
     throw new Error('Function not implemented.');
 }
-
diff --git a/backend/src/services/questions.ts b/backend/src/services/questions.ts
index 238ebd45..ee003bcd 100644
--- a/backend/src/services/questions.ts
+++ b/backend/src/services/questions.ts
@@ -1,17 +1,15 @@
-import {getAnswerRepository, getQuestionRepository} from "../data/repositories.js";
-import {mapToQuestionDTO, mapToQuestionId, QuestionDTO, QuestionId} from "../interfaces/question.js";
-import {Question} from "../entities/questions/question.entity.js";
-import {Answer} from "../entities/questions/answer.entity.js";
-import {mapToAnswerDTO, mapToAnswerId} from "../interfaces/answer.js";
-import {QuestionRepository} from "../data/questions/question-repository.js";
-import {LearningObjectIdentifier} from "../entities/content/learning-object-identifier.js";
-import {mapToUser} from "../interfaces/user.js";
-import {Student} from "../entities/users/student.entity.js";
-import { mapToStudent } from "../interfaces/student.js";
+import { getAnswerRepository, getQuestionRepository } from '../data/repositories.js';
+import { mapToQuestionDTO, mapToQuestionId, QuestionDTO, QuestionId } from '../interfaces/question.js';
+import { Question } from '../entities/questions/question.entity.js';
+import { Answer } from '../entities/questions/answer.entity.js';
+import { mapToAnswerDTO, mapToAnswerId } from '../interfaces/answer.js';
+import { QuestionRepository } from '../data/questions/question-repository.js';
+import { LearningObjectIdentifier } from '../entities/content/learning-object-identifier.js';
+import { mapToUser } from '../interfaces/user.js';
+import { Student } from '../entities/users/student.entity.js';
+import { mapToStudent } from '../interfaces/student.js';
 
-export async function getAllQuestions(
-    id: LearningObjectIdentifier, full: boolean
-): Promise<QuestionDTO[] | QuestionId[]> {
+export async function getAllQuestions(id: LearningObjectIdentifier, full: boolean): Promise<QuestionDTO[] | QuestionId[]> {
     const questionRepository: QuestionRepository = getQuestionRepository();
     const questions = await questionRepository.findAllQuestionsAboutLearningObject(id);
 
@@ -19,7 +17,7 @@ export async function getAllQuestions(
         return [];
     }
 
-    const questionsDTO: QuestionDTO[]  = questions.map(mapToQuestionDTO);
+    const questionsDTO: QuestionDTO[] = questions.map(mapToQuestionDTO);
 
     if (full) {
         return questionsDTO;
@@ -31,21 +29,20 @@ export async function getAllQuestions(
 async function fetchQuestion(questionId: QuestionId): Promise<Question | null> {
     const questionRepository = getQuestionRepository();
 
-    return await questionRepository.findOne(
-        {
-            learningObjectHruid: questionId.learningObjectIdentifier.hruid,
-            learningObjectLanguage: questionId.learningObjectIdentifier.language,
-            learningObjectVersion: questionId.learningObjectIdentifier.version,
-            sequenceNumber: questionId.sequenceNumber
-        }
-    )
+    return await questionRepository.findOne({
+        learningObjectHruid: questionId.learningObjectIdentifier.hruid,
+        learningObjectLanguage: questionId.learningObjectIdentifier.language,
+        learningObjectVersion: questionId.learningObjectIdentifier.version,
+        sequenceNumber: questionId.sequenceNumber,
+    });
 }
 
 export async function getQuestion(questionId: QuestionId): Promise<QuestionDTO | null> {
     const question = await fetchQuestion(questionId);
 
-    if (!question)
-        {return null}
+    if (!question) {
+        return null;
+    }
 
     return mapToQuestionDTO(question);
 }
@@ -54,18 +51,21 @@ export async function getAnswersByQuestion(questionId: QuestionId, full: boolean
     const answerRepository = getAnswerRepository();
     const question = await fetchQuestion(questionId);
 
-    if (!question)
-        {return [];}
+    if (!question) {
+        return [];
+    }
 
     const answers: Answer[] = await answerRepository.findAllAnswersToQuestion(question);
 
-    if (!answers)
-        {return []}
+    if (!answers) {
+        return [];
+    }
 
     const answersDTO = answers.map(mapToAnswerDTO);
 
-    if (full)
-        {return answersDTO}
+    if (full) {
+        return answersDTO;
+    }
 
     return answersDTO.map(mapToAnswerId);
 }
@@ -79,10 +79,10 @@ export async function createQuestion(questionDTO: QuestionDTO) {
         await questionRepository.createQuestion({
             loId: questionDTO.learningObjectIdentifier,
             author,
-            content: questionDTO.content }
-        );
+            content: questionDTO.content,
+        });
     } catch (e) {
-        return null
+        return null;
     }
 
     return questionDTO;
@@ -93,18 +93,15 @@ export async function deleteQuestion(questionId: QuestionId) {
 
     const question = await fetchQuestion(questionId);
 
-    if (!question)
-        {return null}
-
-    try {
-        await questionRepository.removeQuestionByLearningObjectAndSequenceNumber(
-            questionId.learningObjectIdentifier, questionId.sequenceNumber
-        );
-    } catch (e) {
-        return null
+    if (!question) {
+        return null;
     }
 
-    return question
+    try {
+        await questionRepository.removeQuestionByLearningObjectAndSequenceNumber(questionId.learningObjectIdentifier, questionId.sequenceNumber);
+    } catch (e) {
+        return null;
+    }
+
+    return question;
 }
-
-
diff --git a/backend/src/services/students.ts b/backend/src/services/students.ts
index 3b677a10..5099a18d 100644
--- a/backend/src/services/students.ts
+++ b/backend/src/services/students.ts
@@ -1,9 +1,4 @@
-import {
-    getClassRepository,
-    getGroupRepository,
-    getStudentRepository,
-    getSubmissionRepository,
-} from '../data/repositories.js';
+import { getClassRepository, getGroupRepository, getStudentRepository, getSubmissionRepository } from '../data/repositories.js';
 import { Class } from '../entities/classes/class.entity.js';
 import { Student } from '../entities/users/student.entity.js';
 import { AssignmentDTO } from '../interfaces/assignment.js';
@@ -14,7 +9,6 @@ import { mapToSubmissionDTO, SubmissionDTO } from '../interfaces/submission.js';
 import { getAllAssignments } from './assignments.js';
 import { UserService } from './users.js';
 
-
 export async function getAllStudents(): Promise<StudentDTO[]> {
     const studentRepository = getStudentRepository();
     const users = await studentRepository.findAll();
@@ -38,9 +32,9 @@ export async function createStudent(userData: StudentDTO): Promise<StudentDTO |
     try {
         const newStudent = studentRepository.create(mapToStudent(userData));
         await studentRepository.save(newStudent);
-    
+
         return mapToStudentDTO(newStudent);
-    } catch(e) {
+    } catch (e) {
         console.log(e);
         return null;
     }
@@ -57,9 +51,9 @@ export async function deleteStudent(username: string): Promise<StudentDTO | null
 
     try {
         await studentRepository.deleteByUsername(username);
-    
+
         return mapToStudentDTO(user);
-    } catch(e) {
+    } catch (e) {
         console.log(e);
         return null;
     }
@@ -94,11 +88,7 @@ export async function getStudentAssignments(username: string, full: boolean): Pr
     const classRepository = getClassRepository();
     const classes = await classRepository.findByStudent(student);
 
-    const assignments = (
-        await Promise.all(
-            classes.map(async (cls) => await getAllAssignments(cls.classId!, full))
-        )
-    ).flat();
+    const assignments = (await Promise.all(classes.map(async (cls) => await getAllAssignments(cls.classId!, full)))).flat();
 
     return assignments;
 }
@@ -121,9 +111,7 @@ export async function getStudentGroups(username: string, full: boolean): Promise
     return groups.map(mapToGroupDTOId);
 }
 
-export async function getStudentSubmissions(
-    username: string
-): Promise<SubmissionDTO[]> {
+export async function getStudentSubmissions(username: string): Promise<SubmissionDTO[]> {
     const studentRepository = getStudentRepository();
     const student = await studentRepository.findByUsername(username);
 
@@ -135,4 +123,4 @@ export async function getStudentSubmissions(
     const submissions = await submissionRepository.findAllSubmissionsForStudent(student);
 
     return submissions.map(mapToSubmissionDTO);
-}
\ No newline at end of file
+}
diff --git a/backend/src/services/submissions.ts b/backend/src/services/submissions.ts
index c9135001..a8fa96c7 100644
--- a/backend/src/services/submissions.ts
+++ b/backend/src/services/submissions.ts
@@ -1,13 +1,13 @@
-import {getGroupRepository, getSubmissionRepository} from "../data/repositories.js";
-import { Language } from "../entities/content/language.js";
-import { LearningObjectIdentifier } from "../entities/content/learning-object-identifier.js";
-import {mapToSubmission, mapToSubmissionDTO, SubmissionDTO} from "../interfaces/submission.js";
+import { getGroupRepository, getSubmissionRepository } from '../data/repositories.js';
+import { Language } from '../entities/content/language.js';
+import { LearningObjectIdentifier } from '../entities/content/learning-object-identifier.js';
+import { mapToSubmission, mapToSubmissionDTO, SubmissionDTO } from '../interfaces/submission.js';
 
 export async function getSubmission(
     learningObjectHruid: string,
     language: Language,
     version: number,
-    submissionNumber: number,
+    submissionNumber: number
 ): Promise<SubmissionDTO | null> {
     const loId = new LearningObjectIdentifier(learningObjectHruid, language, version);
 
@@ -29,29 +29,23 @@ export async function createSubmission(submissionDTO: SubmissionDTO) {
         const newSubmission = await submissionRepository.create(submission);
         await submissionRepository.save(newSubmission);
     } catch (e) {
-        return null
+        return null;
     }
 
     return submission;
 }
 
-export async function deleteSubmission(
-    learningObjectHruid: string,
-    language: Language,
-    version: number,
-    submissionNumber: number
-) {
+export async function deleteSubmission(learningObjectHruid: string, language: Language, version: number, submissionNumber: number) {
     const submissionRepository = getSubmissionRepository();
 
     const submission = getSubmission(learningObjectHruid, language, version, submissionNumber);
 
-    if (!submission)
-        {return null}
+    if (!submission) {
+        return null;
+    }
 
     const loId = new LearningObjectIdentifier(learningObjectHruid, language, version);
     await submissionRepository.deleteSubmissionByLearningObjectAndSubmissionNumber(loId, submissionNumber);
 
     return submission;
 }
-
-
diff --git a/backend/src/services/teachers.ts b/backend/src/services/teachers.ts
index 2f462ed9..f4dbedfe 100644
--- a/backend/src/services/teachers.ts
+++ b/backend/src/services/teachers.ts
@@ -9,12 +9,7 @@ import { Teacher } from '../entities/users/teacher.entity.js';
 import { ClassDTO, mapToClassDTO } from '../interfaces/class.js';
 import { getClassStudents } from './class.js';
 import { StudentDTO } from '../interfaces/student.js';
-import {
-    mapToQuestionDTO,
-    mapToQuestionId,
-    QuestionDTO,
-    QuestionId,
-} from '../interfaces/question.js';
+import { mapToQuestionDTO, mapToQuestionId, QuestionDTO, QuestionId } from '../interfaces/question.js';
 import { UserService } from './users.js';
 import { mapToUser } from '../interfaces/user.js';
 import { mapToTeacher, mapToTeacherDTO, TeacherDTO } from '../interfaces/teacher.js';
@@ -42,9 +37,9 @@ export async function createTeacher(userData: TeacherDTO): Promise<TeacherDTO |
     try {
         const newTeacher = teacherRepository.create(mapToTeacher(userData));
         await teacherRepository.save(newTeacher);
-    
+
         return mapToTeacherDTO(newTeacher);
-    } catch(e) {
+    } catch (e) {
         console.log(e);
         return null;
     }
@@ -61,9 +56,9 @@ export async function deleteTeacher(username: string): Promise<TeacherDTO | null
 
     try {
         await teacherRepository.deleteByUsername(username);
-    
+
         return mapToTeacherDTO(user);
-    } catch(e) {
+    } catch (e) {
         console.log(e);
         return null;
     }
@@ -93,11 +88,7 @@ export async function getClassIdsByTeacher(username: string): Promise<string[]>
 export async function fetchStudentsByTeacher(username: string) {
     const classes = await getClassIdsByTeacher(username);
 
-    return (
-        await Promise.all(
-            classes.map(async (id) => getClassStudents(id))
-        )
-    ).flat();
+    return (await Promise.all(classes.map(async (id) => getClassStudents(id)))).flat();
 }
 
 export async function getStudentsByTeacher(username: string): Promise<StudentDTO[]> {
@@ -122,10 +113,7 @@ export async function fetchTeacherQuestions(username: string): Promise<QuestionD
 
     // Fetch all questions related to these learning objects
     const questionRepository = getQuestionRepository();
-    const questions =
-        await questionRepository.findAllByLearningObjects(
-            learningObjects
-        );
+    const questions = await questionRepository.findAllByLearningObjects(learningObjects);
 
     return questions.map(mapToQuestionDTO);
 }