Unhandled error when session is empty

[pablorsk]

Describe the bug
An unhandled error occurs when session is expired or empty on TwoFactorChallenge.php:102, becasue $user never is set and, accordingly, is not possible to return variable.

To Reproduce
Steps to reproduce the behavior:

1. Log in and will be redirect to /two-factor-challenge.
2. Clear your session data.
3. Put some Code
4. You see an unhandler error.

Expected behavior
Log in error.

Additional context

Undefined variable $user

On /app/vendor/webbingbrasil/filament-2fa/src/Http/Livewire/Auth/TwoFactorChallenge.php:102 (code 0)
Stacktrace:
#0 /app/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php(266): Illuminate\Foundation\Bootstrap\HandleExceptions->handleError()
#1 /app/vendor/webbingbrasil/filament-2fa/src/Http/Livewire/Auth/TwoFactorChallenge.php(102): Illuminate\Foundation\Bootstrap\HandleExceptions->Illuminate\Foundation\Bootstrap{closure}()
#2 /app/vendor/webbingbrasil/filament-2fa/src/Http/Livewire/Auth/TwoFactorChallenge.php(164): Webbingbrasil\FilamentTwoFactor\Http\Livewire\Auth\TwoFactorChallenge->challengedUser()
#3 /app/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(36): Webbingbrasil\FilamentTwoFactor\Http\Livewire\Auth\TwoFactorChallenge->verify()
#4 /app/vendor/laravel/framework/src/Illuminate/Container/Util.php(41): Illuminate\Container\BoundMethod::Illuminate\Container{closure}()
#5 /app/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(93): Illuminate\Container\Util::unwrapIfClosure()
#6 /app/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(37): Illuminate\Container\BoundMethod::callBoundMethod()
#7 /app/vendor/livewire/livewire/src/ComponentConcerns/HandlesActions.php(149): Illuminate\Container\BoundMethod::call()