Webservice credentials - OpenID/Android AccountManager?

Question

I'm building a webservice and would like to use the user's google account credentials.

The service runs on GAE and will have a web client and an Android native client.

This is my first attempt of something like this and I've been reading about OpenID and the Android AccountManager library.

I'm still not sure what are my options in terms of storing the users in my Datastore. What Identifier should I use ? Is it possible to use OpenID on a native Android application ?

Any help and/or pointers would be appreciated. Thanks.

Answer 1

Waitting for answers