Just follow Apple ID Authentication. But, we still can’t use sign with apple natively (IOS) and other platforms.
In Client ID, if I set App ID then IOS will work, and Android will get this error: {"code": 47, "message": "invalid id token: 'aud' must be a string containing the client_id"}
If I set the Service ID then Android works, and IOS will get the above error.
Because apple natively is using clientId as App ID, but other is using Service ID.
And we can’t put both in the Client ID