code: def _get_enterprise_customer_users_batch(self, start, end):
          
          LOGGER.info('Fetching new batch of enterprise customer users from indexes: %s to %s', start, end)
          return User.objects.filter(pk__in=self._get_enterprise_customer_user_ids())[start:end]
docs: Returns a batched queryset of EnterpriseCustomerUser objects.