Answers for "how to align div in center of screen using bootstrap 4"

artisan make auth

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

align eliment in center of row bootstrap

<div class="row justify-content-center">
  ...inner divs and content...
</div>

how to center vertically in bootstrap col

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