It gets this information based on the clients connected to socketIO (which is all in-memory).

The authors are retrieved via [ueberdb](https://github.com/Pita/ueberDB). I would expect that this information would still be in the cache. If it's not, it would be a query to Cassandra. We could potentially optimize this by providing an endpoint in the `ep_oae`, as we don't really need the author info.