source: app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use App\Models\Organizer;
use App\Models\Transaction;
use Illuminate\Support\Facades\Blade;
use Illuminate\Support\ServiceProvider;
use Laravel\Cashier\Cashier;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        Cashier::ignoreMigrations();
    }

    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
//        Cashier::useCustomerModel(Organizer::class);
//        Cashier::useSubscriptionModel(Transaction::class);
//        Cashier::calculateTaxes();
        Blade::directive('currency', function ($money) {
            return "<?php echo '$' . number_format($money, 2); ?>";
        });
    }
}