docs: def list(self, label=None, per_page=20, page=1):
          """ Get a list of identities that have been created
  
              :param per_page: The number of results per page returned
              :type per_page: int
              :param page: The page number of the results
              :type page: int
              :return: dict of REST API output with headers attached
              :rtype: :class:`~datasift.request.DictResponse`
              :raises: :class:`~datasift.exceptions.DataSiftApiException`,
                  :class:`requests.exceptions.HTTPError`
          """
  
          params = {'per_page': per_page, 'page': page}
  
          if label:
              params['label'] = label
  
          return self.request.get('', params)