Quake Live & Jabber

Everyone knows that Quake Live uses XMPP for embedded chat and authorization. Maybe to transfer game data too.

But how to login to their server as a regular client?
I added a lol2fast4u@quakelive.com account to Gajim, the server set xmpp.quakelive.com - does not accept the login and password.
I tried to drive lol2fast4u@xmpp.quakelive.com - the same.