datatable.directory/app/Console/Commands/ConfirmUser.php

<?php

namespace App\Console\Commands;

use App\Models\User;
use Illuminate\Console\Command;

class ConfirmUser extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'user:confirm {user}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Confirm user\'s e-mail (for testing)';

    /**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct()
    {
        parent::__construct();
    }

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        $u = User::resolve($this->argument('user'));
        $u->update(['confirmed' => true]);
        $this->info("User #$u->id with e-mail $u->email and handle @$u->name was confirmed.");

        dd($u);
    }
}