Package seems not to work with Sanctum / Laravel 9?

Hi there guys,

I have some really weird issue implementing this package in a project of mine. This is weird, since I have two other projects with this package working.

The error I am receiving when installing this package is:

```
InvalidArgumentException : Auth driver [sanctum] for guard [sanctum] is not defined.
/project/vendor/laravel/framework/src/Illuminate/Auth/AuthManager.php:117
/project/vendor/laravel/framework/src/Illuminate/Auth/AuthManager.php:76
/project/vendor/laravel/sanctum/src/Sanctum.php:68
```

I have done some digging and found out that the `sanctum` driver is missing in the `customCreators` property of `AuthManager`. When I disable the `ImpersonateServiceProvider::registerAuthDriver` method, my tests run perfectly, but impersonation doesn't work. I see that the `sanctum` driver is visible in the `customCreators` property of `AuthManager`.

I am not a specialist in the authentication system of Laravel, so I don't have any clue why this is happening.

Do you have any direction for me to dig further?

Regards, Bob