Retrieve Provider from SignInScreen actions

[lesnitsky]

Discussed in #74

^{Originally posted by jeanmatthieud August 24, 2023}
Hi,

I use a SignInScreen, and I want to be able to retrieve the current provider during AuthStateChangeAction.

eg.:

SignInScreen(
  // Providers are set with FirebaseUIAuth.configureProviders()
  // providers: [],
  actions: [
    AuthStateChangeAction<AuthFailed>((context, state) {
      // I want to be able to manage the AuthFailed state according to the provider
      // or even call a provider function to recover from the error
    }),
  ],
)

How can we know which provider is linked to the current AuthStateChangeAction callback?