Answers for "What is auth () in Laravel?"

php artisan auth

// How to install Auth in laravel

// With Boothstrap
composer require laravel/ui --dev
php artisan ui bootstrap --auth
npm install && npm run dev

// With VUE
composer require laravel/ui --dev
php artisan ui vue --auth
npm install && npm run dev

laravel setup auth

// Only for laravel 6.x and higher
composer require laravel/ui "^1.0" --dev

php artisan ui vue --auth