trove/app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use App\Listeners\UrlDiscoveredListener;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\ServiceProvider;
use Lvl0\FediDiscover\Events\UrlDiscovered;

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

    /**
     * Bootstrap any application services.
     */
    public function boot(): void
    {
        Event::listen(UrlDiscovered::class, UrlDiscoveredListener::class);
    }
}