code: def results(self, key):
          
          if not results_backend:
              return json_error_response("Results backend isn't configured")
  
          read_from_results_backend_start = now_as_float()
          blob = results_backend.get(key)
          stats_logger.timing(
              'sqllab.query.results_backend_read',
              now_as_float() - read_from_results_backend_start,
          )
          if not blob:
              return json_error_response(
                  'Data could not be retrieved. '
                  'You may want to re-run the query.',
                  status=410,
              )
  
          query = db.session.query(Query).filter_by(results_key=key).one()
          rejected_tables = security_manager.rejected_datasources(
              query.sql, query.database, query.schema)
          if rejected_tables:
              return json_error_response(security_manager.get_table_access_error_msg(
                  '{}'.format(rejected_tables)), status=403)
  
          payload = utils.zlib_decompress_to_string(blob)
          display_limit = app.config.get('DEFAULT_SQLLAB_LIMIT', None)
          if display_limit:
              payload_json = json.loads(payload)
              payload_json['data'] = payload_json['data'][:display_limit]
          return json_success(
              json.dumps(
                  payload_json,
                  default=utils.json_iso_dttm_ser,
                  ignore_nan=True,
              ),
          )
docs: Serves a key off of the results backend