Answers for "how to center all cards vertically in bootstrap"

laravel make:auth

composer require laravel/ui
php artisan ui vue --auth
php artisan migrate

auth::login in laravel

public function manualLogin(){
    $user = User::find(1);
    Auth::login($user);
    return redirect('/');
}


or 
  
  
  Auth::logout();

how to center vertically in bootstrap col

<div class="my-auto">
  ...inner divs and content...
</div>