Apple "user info" endpoint URL

Hi,

I'm currently implementing various social login flows in Salesforce.

Such an implementation essentially requires 3 steps:

1. get an authorization code
2. get an access token using the authorization code
3. get user info using the access token

I'm struggling with step 3.

For example, Google provides this endpoint URL: https://www.googleapis.com/oauth2/v3/userinfo, but I can't find the equivalent for Apple.

Can anybody help?

Thanks