I think we should rename this method to `redis_connection` since this is being mixed in to quite a few classes and used everywhere.

Or

Actually, it would be much better to use it as a singleton class and then we don't need to mix it in everywhere and get rid of `@@`. We could just use it as `RedisStore.connection.hset` and it will be much clearer in the other classes (assuming the new class is called `RedisStore`), thoughts?