Problem with authenticating in laravel when using dynamic route configurations - laravel

Question

I use JWT authentication for my laravel api middleware group. Here is my route configuration:
Route::group(['middleware' => ['api']], function() {
Route::post('login', 'AuthController#login');
Route::post('test', 'AuthController#test');
});
This code works well and I can't have unauthorized access to test method of my AuthController class:
class AuthController extends Controller
{
public function __construct()
{
$this->middleware(['jwt.auth'])->except('login');
}
public function login()
{
//...
}
public function test()
{
//...
}
}
but when I change the route config to identify controller's methods name dynamically (as you see in the following code snippet), the authentication does not work anymore and I can access test method without bearer token!
Route::group(['middleware' => ['api']], function() {
Route::post('/{controller}/{method}', function ($controller, $method) {
$controllerClass = 'App\\Http\\Controllers\\'.$controller.'Controller';
if(method_exists($controllerClass, $method))
{
$controller = App::make($controllerClass);
return $controller->callAction($method, array());
}
return abort(404);
});
});
Any idea?