code: def get_all_users(self, nid=None):
          
          r = self.request(
              method="network.get_all_users",
              nid=nid
          )
          return self._handle_error(r, "Could not get users.")
docs: Get a listing of data for each user in a network `nid`
  
          :type  nid: str
          :param nid: This is the ID of the network to get users
              from. This is optional and only to override the existing
              `network_id` entered when created the class
          :returns: Python object containing returned data, a list
              of dicts containing user data.