code: function createClient(redisClientOptions) {
    const client = redis.createClient(redisClientOptions);
    if (!client._options) {
      client._options = redisClientOptions;
    }
    return client;
  }
docs: Creates a new RedisClient instance.
  @param {RedisClientOptions|undefined} [redisClientOptions] - the options to use to construct the new RedisClient
  instance
  @return {RedisClient} returns the new RedisClient instance