code: def get_users_batch(self, ids):
      
      # Allowed maximum number of ids is 50
      assert len(ids) <= 50
      ids_ = ','.join(ids)
      url = _USERS_BATCH.format(c_api=_C_API_BEGINNING,
                                                api=_API_VERSION,
                                                ids=ids_,
  					      at=self.access_token)
      return _get_request(url)
docs: Ids: a list of ids that we want to return