[Feature] Provide Reauthenticate method under CrossFirebaseAuth.Current.CurrentUser

[Kapusch]

Hi @TobiasBuchholz , recently Apple requested app developers to provide a way for their users to delete their account.

I was happy to find the DeleteAsync method under CrossFirebaseAuth.Current.CurrentUser, however I have faced a FIRAuthErrorCodeRequiresRecentLogin which basically indicates the user has attempted a sensitive operation more than 5 minutes after signing in, and then requires recent authentication.

I could prompt a dialog for the user to be able to reauthenticate, however this is not suitable for users who signed in with Google, Facebook or Apple.

I can explain to my users that they need to reauthenticate and quickly go for the deletion of their account, however this would be neat having a Reauthenticate method under CrossFirebaseAuth.Current.CurrentUser.

I can see from the docs there is a way to do so with providers as well.

[angelru]

@Kapusch I am facing the same issue, how did you solve it?

[Kapusch]

Hey @angelru , I did not solve it actually. All I was able to do is catching error code for FIRAuthErrorCodeRequiresRecentLogin:
catch (Exception ex) when (ex.Message.Contains("17014"))

so that I can inform the user must re-authenticate for security reasons before they can delete their account.

Note: this DeleteAsync() method only remove the user from the Firebase instance, you still have to delete all the Firestore / Storage data manually.

[AdamEssenmacher]

This plugin is built on the Xamarin.iOS bindings published by Microsoft. The reauthenticate method in these bindings has been broken since version 6, and this PR to fix it is almost a year old.

So, while this plugin could be extended to include this iOS API, it won't actually work until one of two things happens:

1. Microsoft updates its iOS Firebase bindings.
2. This plugin migrates away from Microsoft's iOS Firebase bindings.

[AdamEssenmacher]

This should be fixed with 3.0.0