displayName not set in Firebase user auth.create trigger with Apple sign in

[ottob]

Related issues

#95 but that is another provider. I tried the workaround posted there. Calling firebase auth from the trigger to get the user.

let user = await admin.auth().getUser(userRecord.uid);
user = user.toJSON();
// user.displayName is valid while userRecord.displayName is undefined.

but displayName is empty there also.

[REQUIRED] Version info

node: v14.15.4

firebase-functions: 3.13.1

firebase-tools: 9.3.0

firebase-admin: 9.4.2

[REQUIRED] Test case

exports.saveUser = functions.auth.user().onCreate((user) => {
  console.log('user displayName', user.displayName)
})

[REQUIRED] Steps to reproduce

1. Sign in with Apple with a new user (in react native iOS app). Make sure that the name is shared from the Sign in with Apple prompt.
2. Notice the trigger being run when the user is created.

[REQUIRED] Expected behavior

To see the name of the user. The displayName is set when using Facebook or Google providers with Firebase Auth, but not when using the Apple provider.

[REQUIRED] Actual behavior

displayName is empty.

Were you able to successfully deploy your functions?

Yes

Im sorry if this is the wrong place to report this issue. But there are many moving parts involved and its hard to say where the problem is:

firebase-functions
firebase-tools
firebase-admin
https://github.com/invertase/react-native-apple-authentication
https://github.com/invertase/react-native-firebase/tree/master/packages/auth

[taeold]

I think firebase/firebase-ios-sdk#4393 explains the behavior:

The fullName is not returned in Apple's ID token so that we can't use it as displayName directly. However, you may opt to get the fullName through "appleIDCredential.fullName" in didCompleteWithAuthorization delegate method, and update user's profile by yourselves.

I looks like the workaround is a bit tricky b/c of how apple id shares user name with Firebase Auth. I'd suggest we bring the issue to that thread (which, unfortunately, is still quite active).