WebAPP/database/seeders/AdminSeeder.php

<?php

namespace Database\Seeders;

use App\Enums\UserRole;
use App\Models\User;
use Illuminate\Database\Seeder;

class AdminSeeder extends Seeder
{
    public function run(): void
    {
        $email = env('ADMIN_EMAIL');
        $password = env('ADMIN_PASSWORD');

        if (! $email || ! $password) {
            $this->command?->error('ADMIN_EMAIL und ADMIN_PASSWORD müssen in .env gesetzt sein!');

            return;
        }

        User::updateOrCreate(
            ['email' => $email],
            [
                'name' => 'Administrator',
                'password' => $password,
                'role' => UserRole::Admin,
                'is_active' => true,
            ]
        );
    }
}