Get controller's method variables in Filter's before method

Hi,

I know it is possible to get the variables in the controller's _remap() method though I'd like to have a filter handling a logic at a higher level (if possible).

Here's an example of my code:

PHP Code:

        $routes->get('users/(:num)', 'User::view/$1', [
            'as' => 'user',
            'filter' => 'permission:user-view',
        ]); 


Is there a way to get the userId I'm passing in the route inside the before method of the permission filter?

Thanks for any help!