Re: Accessing user email and other info

[Greg Robbins]

After signing in to a Google account, the GTMOAuth2Authentication object has the user's email address in its userEmail property. The user's email address is also saved with the OAuth 2 refresh token to the keychain.

Additional user profile information is available if a property is set on the GTMOAuth2SignIn object prior to displaying the view controller:

  viewController.signIn.shouldFetchGoogleUserProfile = YES

Then immediately following the user's successful sign-in, the sign-in object's userProfile property will have a dictionary of additional user details. Unlike the user's email address, the profile details are not saved to the keychain by the library.

The profile information is documented at https://developers.google.com/accounts/docs/OAuth2Login#userinfocall

There is no support for obtaining user email or profile information from services other than Google, since user details are not covered by the OAuth 2 protocol, unfortunately.