Hi Dog2puppy,
Welcome to Microsoft Q&A! Thanks for posting this question.
For all language frameworks, App Service makes the user's claims available to your code by injecting them into the request headers. External requests aren't allowed to set these headers, so they are present only if set by App Service. Some example headers include:
X-MS-CLIENT-PRINCIPAL-NAME
X-MS-CLIENT-PRINCIPAL-ID
From your client code (such as a mobile app or in-browser JavaScript), send an HTTP GET request to /.auth/me. The returned JSON has the provider-specific tokens.
By default, the claim which is obtained from Google provider doesn’t contain the users email address. You can try following the steps in this blog to configure your app to retrieve users email address.
Hope that helps.
-Grace