[Cards, Users] Check unique and return error

app/controllers/userManager.py

@@ -1,6 +1,6 @@
 import logging
 logger = logging.getLogger(__name__)
-from fastapi import APIRouter, HTTPException, Depends
+from fastapi import APIRouter, HTTPException, Depends, status
 from sqlmodel import Session, select
 from typing import List
 
@@ -13,6 +13,9 @@ user_router = APIRouter(tags=["Users"], prefix="/api/v1/users")
 @user_router.post("/", response_model=UserResponse)
 def create_user(*, db: Session = Depends(get_session), user: UserCreate, admin: bool = Depends(auth_is_admin)):
     hashed_password = {"passwordhash": get_password_hash(user.password)}
+    try: assert db.exec(select(UserDB).where(UserDB.name == user.name)).one_or_none() == None
+    except AssertionError:
+        raise HTTPException(status.HTTP_409_CONFLICT, detail="Name already used!")
     db_user = UserDB.model_validate(user, update=hashed_password)
     return add_and_refresh(db, db_user)