code: function handleRefreshResponse (key, data, err, response) {
      if(!err) {
        this.set(key, response, (data.lifeSpan / 1000), data.refresh, function(){});
      }
    }
docs: Handle the refresh callback from the consumer, save the data to redis.
  
  @param {string} key The key used to save.
  @param {Object} data refresh keys data.
  @param {Error|null} err consumer callback failure.
  @param {*} response The consumer response.