Fix lint issues for security and user modules

Author: MoSchmidt

Backend/app/core/security.py

@@ -63,4 +63,4 @@ def get_current_user(token: str = Depends(oauth2_scheme)) -> str:
             detail="Invalid token payload.",
         )
 
-    return username
+    return username

Backend/app/routes/user_routes.py

@@ -24,7 +24,10 @@ def create_user(request: UserCreate, db: Session = Depends(get_db)) -> User:
     """Create a new user record if the username is available."""
 
     if db.query(User).filter(User.username == request.username).first():
-        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Username already exists")
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Username already exists",
+        )
     user = User(username=request.username)
     db.add(user)
     db.commit()
@@ -43,4 +46,4 @@ def get_current_user_profile(
     if not user:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found.")
 
-    return user
+    return user

Backend/app/schemas/user_dto.py

@@ -9,7 +9,7 @@ class UserResponse(BaseModel):
     id: int
     username: str
 
-    class Config:
+    class Config:  # pylint: disable=too-few-public-methods
         """Pydantic configuration options."""
 
         from_attributes = True  # For Pydantic v2