Answers for "laravel does auth() work in service class"

laravel check auth

use Illuminate\Support\Facades\Auth;

if (Auth::check()) {
    // The user is logged in...
}

laravel auth

composer require laravel/ui
// Generate basic scaffolding...
php artisan ui bootstrap
php artisan ui vue
php artisan ui react

// Generate login / registration scaffolding...
php artisan ui bootstrap --auth
npm install && npm run dev
php artisan ui vue --auth
php artisan ui react --auth