Getting user's information in Apple Server

Upon exploring in your documentation (https://developer.apple.com/documentation/signinwithapplerestapi) we want to integrate this in our product.


Our goal is to have a separate api/appserver code to handle this extraction of user's information. So that we can expose our API endpoint to other team. Consumer of our API endpoint, we'll only pass a token generated in their side and our api/appserver will use the token to communicate with Apple Server to retrieve user's information and return to our consumers.


1. What is the exact Apple Web Service Endpoint to extract user's information.
2. Is it possible to create token separately accross different products (mobile app and api/appserver) and passing token only
3. Is there an apple online tool (e.g. https://developers.facebook.com/tools/explorer/) to generate token