def post(self): register_fields = json.loads(self.request.body) #Check if email exists: email = register_fields["email"] name = register_fields["name"] city = register_fields["city"] query = ndb.gql("SELECT * FROM User WHERE email=:1", email).fetch() if not query: user = User() user.email = email user.name = name user.city = city user.put() else: logging.info("User exists")