👨‍⚕️ Preparing the service provider

First of all, publish the Provider file:

php artisan vendor:publish --provider="RenokiCo\CashierRegister\CashierRegisterServiceProvider" --tag="provider"

Import the created app/Providers/CashierRegisterServiceProvider class into your app.php:

$providers = [
    // ...
    App\Providers\CashierRegisterServiceProvider::class,
];