implement update profile endpoint

ki/auth.py

@@ -22,7 +22,7 @@ def auth(username, password):
         user = User.query.filter(User.auth_id.__eq__(username)).first()
 
         if user is None:
-            user = User(nickname=username, auth_id=username)
+            user = User(auth_id=username)
             db.session.add(user)
 
         token = Token(token=str(uuid.uuid4()), user=user)