Determine type of user account and domain for Google Apps when using OpenId

[Vladimir Prudnikov]

I remember that User object had a method called auth_domain(). Now I can't find it int the documentation, so I think it was removed from an API. However this method still exists but always return "gmail.com" even if user logged in from Google Apps account.

If I use OpenID (user can login from regular google account and Google Apps account) how can I determine which user is logged in and especially domain name if it's a Google Apps user?

— Vladimir