blessing-skin-server/app/Providers/PluginServiceProvider.php

<?php

namespace App\Providers;

use App\Services\PluginManager;
use Illuminate\Support\ServiceProvider;

class PluginServiceProvider extends ServiceProvider
{
    public function register()
    {
        $this->app->singleton(PluginManager::class);
        $this->app->alias(PluginManager::class, 'plugins');
    }

    public function boot(PluginManager $plugins)
    {
        $plugins->boot();
    }
}