`Users` API query

[ianwessen]

It'd be nice to display active users to assist in matchmaking. The new game -> opponent selection flow needs this. This is gonna grow really fast, so let's think about how we want to paginate and handle this query.

[camirmas]

I think initially it can be something simple, like "users who have active games in the last x days," but eventually can become more refined to include your "social network," ranking, etc.

[ianwessen]

At the moment, this is most pressing for matchmaking. Can we build something simple like "last N users, limit 100" until we have something better? Just to have something to build UI off of before we have game or session data?

[eaceaser]

i have this stubbed out with pagination ATM. but there's no distinction between online/offline users yet