Hi
I would like to have a system that lets people pick a unique username, that nobody uses.
This cant be the username that people use for registration, as my games database has both SimpleUsers and Facebook users which dont have a username, just a fb123456789 key for the PlayerObjects.
So This has to be set afterwards, and needs to be checked against the entire database, if someone has already picked this username?
Whats the best way of doing this?