nihonbuzz-academy/database/seeders/AdminUserSeeder.php

<?php

namespace Database\Seeders;

use Illuminate\Database\Console\Seeds\WithoutModelEvents;
use Illuminate\Database\Seeder;

class AdminUserSeeder extends Seeder
{
    /**
     * Run the database seeds.
     */
    public function run(): void
    {
        $user = \App\Models\User::firstOrCreate(
            ['email' => 'admin@nihonbuzz.academy'],
            [
                'name' => 'Super Admin',
                'password' => bcrypt('password'),
                'email_verified_at' => now(),
            ]
        );

        $user->assignRole('super_admin');
    }
}