SP: Firebase not check SIGN WITH APPLE current status at launch time

### [REQUIRED] Step 1: Describe your environment

* Xcode version: 13.3.1
* Firebase SDK version: 9.2.0
* Installation method: `Swift Package Manager`
* Firebase Component: Auth
* Target platform(s): `iOS`

### [REQUIRED] Step 2: Describe the problem

SIGN WITH APPLE

We notice that firebase not check the current token. I mean in this flow the user still be logged in:

* User logged in with firebase apple sign in.
* Go to settings, remove the login with apple
* Back to app, the user is still being login.

#### Steps to reproduce:

* User logged in with firebase apple sign in.
* Go to settings, remove the login with apple
* Back to app, the user is still being login.

#### Relevant Code:

We double check the firebase documentation and there's nothing related to it. Apple says that you should check the status at launch time.

https://developer.apple.com/app-store/review/guidelines/#sign-in-with-apple

Thanks in advance