If you want to do this once-off, so there is no need for something fancy like creating an Artisan command etc. I would suggest to simply use php artisan tinker
(great tool!) and add the following commands per user:
$user = new App\User();
$user->password = Hash::make('the-password-of-choice');
$user->email = Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра. ';
$user->name = 'My Name';
$user->save();
https://stackoverflow.com/questions/35753951/manually-register-a-user-in-laravel