app/routers/demo.py: minor changes

app/routers/demo.py

@@ -27,23 +27,23 @@ users_db: dict[str, UserSchema] = {
     sam.username: sam
 }
 
-def validate_auth_user(
+def validate_auth_user(username: str = Form(), password: str = Form()) -> UserSchema | HTTPException:
-        username: str = Form(),
+
-        password: str = Form()
+    if not (user := users_db.get(username)):
-):
+        raise HTTPException(
-    unauthed_exc = HTTPException(
+            status_code=401, 
+            detail="Invalid username or password"
+            )
+
+    is_passwd_valid = validate_password(password=password, hashed_password=user.password)
+    
+    if not is_passwd_valid:
+        raise HTTPException(
             status_code=401,
             detail="Invalid username or password"
             )
-    if not (user := users_db.get(username)):
-        raise unauthed_exc
         
-    if validate_password(
-        password=password,
-        hashed_password=user.password
-    ):
     return user
-    raise unauthed_exc
 
 def get_current_token_payload(
         credentials: HTTPAuthorizationCredentials = Depends(http_bearer)