Google Authentication API: How to get the user's gmail address

Question

Hi, I've been studying the Google authentication API (AuthSub)...My question is, how do I get the user's account information (at least his Gmail address) after the authentication has passed?

Because currently, all I get back from the authentication process is a token granting me access to which ever Google service I have specified in the scope, but there's no easy way to even get the user's login id (gmail address) as far as I can tell...

Thanks,

Answer 1

Google Authentication API is a token based system to authenticate a valid user. It does not expose any of other interface that allows to get account holder information back to authorizer.

Answer 2

If so, what google service allows me to access the user's information?

Answer 3

Using the Google AppEngine GData services, you can request the user to give you access to their Google Mail, Calendar, Picasa, etc. Check it out here.