<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def list_members(self, list_id):
 """ List users in a list :param list_id: list ID number :return: list of :class:`~responsebot.models.User` objects """

        return [User(user._json) for user in self._client.list_members(list_id=list_id)]