How to set identifier on firebase authentication via custom token?

Question

I just implemented the linkedin signup & login using firebase custom auth system through this https://firebase.google.com/docs/auth/admin/create-custom-tokens

It`s working but identifier on firebase is null.

How should I send it? Should I update it after creating the user? I want to save it on create.

Thanks

Answer 1

Try this: On your server, before minting the custom token, you can create the user with the email:

// Create the user with email first.
admin.auth().createUser({uid: uid, email: linkedinEmail})
  .then(function(userRecord) {
    // This will return custom token for that user above.
    return admin.auth().createCustomToken(userRecord.uid);
  })
  .catch(function(error) {
    // Some error.
  });

Another option using client side code, is to set the email client side after signing in with custom token:

firebase.auth().signInWithCustomToken(customToken)
  .then(function(result) {
    return firebase.auth().currentUser.updateEmail(linkedinEmail);
  })
  .catch(function(error) {
    // Some error occurred.
  });