einundzwanzig-app/app/Providers/HorizonServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\Facades\Gate;
use Laravel\Horizon\Horizon;
use Laravel\Horizon\HorizonApplicationServiceProvider;

class HorizonServiceProvider extends HorizonApplicationServiceProvider
{
    /**
     * Bootstrap any application services.
     */
    public function boot(): void
    {
        parent::boot();

        // Horizon::routeSmsNotificationsTo('15556667777');
        // Horizon::routeMailNotificationsTo('example@example.com');
        // Horizon::routeSlackNotificationsTo('slack-webhook-url', '#channel');
    }

    /**
     * Register the Horizon gate.
     *
     * This gate determines who can access Horizon in non-local environments.
     */
    protected function gate(): void
    {
        Gate::define('viewHorizon', function ($user = null) {
            return in_array(optional($user)->nostr, [
                'npub1kz50hl2fk8rkkax3mv8kzx7vdhh3nmuegncsaj8r23w2a49nf3wsne6ejy',
                'npub1pt0kw36ue3w2g4haxq3wgm6a2fhtptmzsjlc2j2vphtcgle72qesgpjyc6',
                'npub1qwj482ffpvnwy4g7twejs4ckgnag9yxpjndqslk6juagmngwwhfsqfe5vq',
            ]);
        });
    }
}