Merge remote-tracking branch 'refs/remotes/origin/fix/databank-laat-toevoegen-van-meerdere-studenten-met-dezelfde-username-toe-#153' into feat/user-routes

# Conflicts:
#	backend/src/controllers/students.ts
#	backend/src/controllers/teachers.ts
#	backend/src/exceptions.ts
#	backend/src/interfaces/student.ts
#	backend/src/routes/router.ts
#	backend/src/routes/students.ts
#	backend/src/services/students.ts
#	backend/src/services/teachers.ts
#	frontend/src/controllers/controllers.ts

frontend/src/controllers/base-controller.ts

@@ -1,4 +1,4 @@
-import {apiConfig} from "@/config.ts";
+import { apiConfig } from "@/config.ts";
 
 export class BaseController {
     protected baseUrl: string;

frontend/src/controllers/controllers.ts

@@ -1,6 +1,5 @@
 import { StudentController } from "@/controllers/students.ts";
 import { TeacherController } from "@/controllers/teachers.ts";
-
 import {ThemeController} from "@/controllers/themes.ts";
 
 export function controllerGetter<T>(Factory: new () => T): () => T {

frontend/src/controllers/themes.ts

@@ -1,4 +1,4 @@
-import {BaseController} from "@/controllers/base-controller.ts";
+import { BaseController } from "@/controllers/base-controller.ts";
 
 export class ThemeController extends BaseController {
     constructor() {