Handle locally saved games (while logged out) saving to DB when logged in

Currently games are only saved to the DB when a user creates or edits a game while logged in.

If a user is logged out, created and edited games are saved to local storage.

Need to come up with a strategy to save local storage games to DB after a user logs in. 

Ideally, there should be a notification asking if the user wants to save them to DB, and whether to make them public or private.