diff --git a/backend/src/data/users/teacher-repository.ts b/backend/src/data/users/teacher-repository.ts
new file mode 100644
index 00000000..2d86c9d1
--- /dev/null
+++ b/backend/src/data/users/teacher-repository.ts
@@ -0,0 +1,11 @@
+import {DwengoEntityRepository} from "../dwengo-entity-repository";
+import {Teacher} from "../../entities/users/teacher.entity";
+
+export class TeacherRepository extends DwengoEntityRepository<Teacher> {
+    public findByUsername(username: string): Promise<Teacher | null> {
+        return this.findOne({username: username});
+    }
+    public deleteByUsername(username: string): Promise<void> {
+        return this.deleteWhere({username: username});
+    }
+}
diff --git a/backend/src/data/users/user-repository.ts b/backend/src/data/users/user-repository.ts
new file mode 100644
index 00000000..111244cd
--- /dev/null
+++ b/backend/src/data/users/user-repository.ts
@@ -0,0 +1,11 @@
+import {DwengoEntityRepository} from "../dwengo-entity-repository";
+import {User} from "../../entities/users/user.entity";
+
+export class StudentRepository extends DwengoEntityRepository<User> {
+    public findByUsername(username: string): Promise<User | null> {
+        return this.findOne({username: username});
+    }
+    public deleteByUsername(username: string): Promise<void> {
+        return this.deleteWhere({username: username});
+    }
+}