code: def star(self, login, repo):
          
          resp = False
          if login and repo:
              url = self._build_url('user', 'starred', login, repo)
              resp = self._boolean(self._put(url), 204, 404)
          return resp
docs: Star to login/repo
  
          :param str login: (required), owner of the repo
          :param str repo: (required), name of the repo
          :return: bool