Answers for "can we used auth function in laravel without installing auth"

install laravel auth

1 - composer create-project laravel/laravel laravel8 8.0
2 - composer require laravel/ui
3 - php artisan ui vue --auth
4 - npm install
5 - npm run dev
6 - php artisan ui:auth
  
7 = > url example.com/login

laravel auth

//namespace
use Illuminate\Support\Facades\Auth;