Unlimited Google Identity Toolkit for Android Apps

I would like to get an anonymous access token for the web back-end as described here:

https://developers.google.com/identity/protocols/CrossClientAuth#androidIdTokens

This article has the following page:

oauth2: server: client_id: [client id] : api_scope: [ scopes ]

After replacing the client id and scopes with my own, I was able to successfully use this with GoogleAuthUtil.getToken (), but I was unable to get it to work with the Google Identity Toolkit for Android. You can't seem to format the region correctly with GitkitClientBuilder.addScopes () as the toolbox adds its own scopes on top of yours.

Can I get an access token over the internet using the Google Identity Toolkit for Android?