code: def members(self):
          
          if self._members is None:
              self._members = MemberList(
                  self._version,
                  service_sid=self._solution['service_sid'],
                  channel_sid=self._solution['sid'],
              )
          return self._members
docs: Access the members
  
          :returns: twilio.rest.chat.v1.service.channel.member.MemberList
          :rtype: twilio.rest.chat.v1.service.channel.member.MemberList