controllers-one-endpoint.php

<?php

/**
 * @Route('/users', methods={'POST'})
 */
class RegisterUserController
{
    private RegisterUserService $service;

    public function __construct(RegisterUserService $service) { ... }

    public function __invoke(Request $request)
    {
        $this->service->register( ... );
    }
}

/**
 * @Route('/users', methods={'GET'})
 */
class GetUserListController
{
    private ListUserService $service;

    public function __construct(ListUserService $service) { ... }

    public function __invoke(Request $request)
    {
        $this->service->getUserList( ... );
    }
}