Google Groups Authentication

I'm aware that there is not an API for Google groups (yet). However, I'm trying to use Google groups mobile in a web view within an app where we access other Google services as well, most specifically Google docs.

Login is done by accessing the Google service login which returns a token that you can use in subsequent request in the HTTP header to get authenticated access. This works perfectly for the Google docs service by supplying the Google docs serviceID.

Unfortunately this does not work for Google groups because there is no serviceID published for this service. Is there any other way to supply a token to Google groups to bypass the login screen and cause the user to be authenticated or is there a hidden ser开发者_JAVA技巧viceID for Google groups that can be used to accomplish this?