code: function RedisTable(redisClient, options) {
    if (!(this instanceof RedisTable)) return new RedisTable(redisClient, options)
    this.client = redisClient || redis.createClient()
    options = options || {}
    this.expiry = options.expiry
    this.prefix = options.prefix || "redisThrottle"
  }
docs: A Redis TokenTable implementation.
  @param {RedisClient} redisClient A redis client to use.
  @param {Options} options RedisTable options
  - expiry: Number of seconds to expire untouched entries (optional)
  - prefix: A string to prefix all token entries with (default 'redisThrottle')