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PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Documentation changes
• Other... Please describe:

PR Checklist

Please check your PR fulfills the following requirements:

Bugfixes:

• Regression testing has been carried out using the example project to ensure the intended bug is fixed and no regression bugs have been inadvertently introduced.

New features/enhancements:

• Exhaustive testing has been carried out for the new functionality
• Regression testing has been carried out to ensure no existing functionality is adversely affected
• Documentation has been added / updated
• The example project has been update to validate/demonstrate the new functionality.

What is the purpose of this PR?

Fixes #867, which was a follow-up of #857

Basically, after you use FirebasePlugin.authenticateUserWithApple() you get a credential object. This object can be used to login with the Firebase javascript SDK:

const appleWebCredentials = appleProvider.credential({idToken: credential.idToken, rawNonce: credential.rawNonce});
firebase.auth().signInWithCredential(appleWebCredentials);

Unfortunately, the rawNonce is not passed from the plugin. This pull request fixes it.

Does this PR introduce a breaking change?

• Yes
• No

What testing has been done on the changes in the PR?

What testing has been done on existing functionality?

Other information