code: def user_stars(self, user_id, extra_query_params={}):
          
          return self.do("GET", "users/{user_id}/stars",
                         url_params={"user_id": user_id},
                         query_params=extra_query_params)
docs: client = BacklogClient("your_space_name", "your_api_key")
          client.user_stars(5)
          client.user_stars(5, {"count": 100, "order": "asc"})