finish rewrite

app/auth.py

@@ -11,7 +11,10 @@ def check_token_domain(db_path: str, token: str, domain: str) -> bool:
 
 # Verify user's passowrd for login. Return UserID on success, None on failure
 def user_login(db_path: str, username: str, password: str) -> int | None:
-    userid = db.User.get_id(db_path, username)
+    try:
+        userid = db.User.get_id(db_path, username)
+    except ValueError:
+        return None
 
     pwsalt, pwhash = db.User.get_password_hash(db_path, userid)