Cannot get name & email with sign in with Apple on real device
So I'm implementing sign in with Apple, everything goes well on the simulator, I request email, fullName scopes, the authenticate UI shows, and I can get the data, as images shown below:
But when testing on real device (iPadOS 13, iPad 2018), the UI didn't show (it does not asks for name and email on the UI), and I can't get the email, fullName from the response, and I can also confirm that the authorizedScopes are empty, I can only get the user identifier
I believe this is a bug and will file a radar, also posted a discussion on the Apple developer forum (but they usually won't approve my post, I don't know why)
If this is not a bug, can somebody tell me how to fix this? Thanks
Answer
Problem solved! tl;dr
This is an expected behavior
Answered by Apple Engineer (Original post link: https://forums.developer.apple.com/thread/121496)
Hi aslkdjalksdjasdasd,
This behaves correctly, user info is only sent in the ASAuthorizationAppleIDCredential upon initial user sign up. Subsequent logins to your app using Sign In with Apple with the same account do not share any user info and will only return a user identifier in the ASAuthorizationAppleIDCredential. It is recommened that you securely cache the initial ASAuthorizationAppleIDCredential containing the user info until you can validate that an account has succesfully been created on your server.
Patrick
2019/12/15 Edit
This behavior is also documented on Apple's Sign in with Apple doc, check the documentation.
Ensure that your app relays the credentials and user information to your app servers. The API collects this information and shares it with your app the first time the user logs in to the app using Sign in with Apple. If the user then uses Sign in with Apple on another device, the API doesn't ask for the user’s name or email again. It collects the information again only if the user stops using Sign in with Apple and later reconnects to your app.