cake-carts/src/Controller/CartsController.php

<?php
declare(strict_types=1);

namespace CakeCarts\Controller;

use App\Controller\AppController;

/**
 * Carts Controller
 *
 * @property \Authorization\Controller\Component\AuthorizationComponent $Authorization
 */
class CartsController extends AppController {

	/**
     * @return void
     */
	public function initialize(): void {
		parent::initialize(); // TODO: Change the autogenerated stub

		if (!$this->components()->has('ShoppingCart')) {
			$this->loadComponent('CakeCarts.ShoppingCart', [
				// This is default config. You can modify "actions" as needed to make
				// component work only for specified methods.
				'actions' => true,
			]);
		}
	}

	/**
     * Index method
     *
     * @return \Cake\Http\Response|null|void Renders view
     */
	public function index() {
		// use cart from beforeFilter
	}

}