How do I retrieve the email address associated with a session token from the Google Data / Google Contacts API?

Question

Possible Duplicate:
How does one retrieve the email address of a user with GData?

Using the GData Java client (http://code.google.com/p/gdata-java-client/), I create an authsub request URL by using AuthSubUtil.getRequestUrl(). I then exchange this for a session token using AuthSubUtil.exchangeForSessionToken() which all works fine. (Using "http://www.google.com/m8/feeds/" as the scope for Contacts)

I can see in the examples and Javadocs how to go about getting the contacts for this session token, but I can't seem to figure out how to get the email address that's just been authenticated.

_{Some of the wording in the documentation makes it seem like this is intentional (to be unable to retrieve that user's login information) but that seems like a gaping hole in functionality to me?}

Answer 1

Google intentionally hides login information in all of its APIs, which includes the user's email address.