Appengine Cloud Endpoints with new Google+ sign-in

Question

How does the new google+ sign-in apis fit into making authenticated calls to Cloud Endpoints. To use OAuth with endpoints the app must request permission for the 'https://www.googleapis.com/auth/userinfo.email' scope at a minimum. Will using the Google+ sign-in button grant this scope? Or am I going to have to ask my users for yet another permission??

Answer 1

The Google+ sign-in button has a "scopes" attribute that you can list additional scopes that you would like to request. You can list the userinfo.email scope there as well as any Cloud specific ones.

If you need to retrieve a user's email address, you can add the userinfo.email scope within that attribute and then use the appropriate REST end point to retrieve the address.

Additionally, to retrieve email addresses in mobile apps, see:

• Android
• iOS.