feat: test service student

backend/src/interfaces/student.ts

@@ -1,16 +1,10 @@
 import { Student } from '../entities/users/student.entity.js';
 
 export interface StudentDTO {
-    id: string;
+    id?: string;
     username: string;
     firstName: string;
     lastName: string;
-    endpoints?: {
-        classes: string;
-        questions: string;
-        invitations: string;
-        groups: string;
-    };
 }
 
 export function mapToStudentDTO(student: Student): StudentDTO {