Пример сервис-провайдера

VKServiceProvider.php

<?php

namespace App\Libs\VK\Laravel;

use Illuminate\Support\ServiceProvider;

class VKServiceProvider extends ServiceProvider
{
	public function register()
	{
		$this->app->singleton('vk', function ($app) {
   			$config = $this->app->config->get('services.vk');
    		        $vk = new \App\Libs\VK\VK($config);
    		        return $vk;
		});
	}
}