get and post route only works for get

Hi
I have this route:

PHP Code:

$routes->group('cms', static function ($routes) {
    $routes->match(['get', 'post'], 'login', [Login::class, 'login'], ['as' => 'login']);
}); 


When I go to cms/login (get), everything works and I get my login screen.
But when I post my credentials there and post the form (without action parameter, so the same page), I get the error: 
What am I missing here?

Code:

404 - File Not Found
Can't find a route for 'post: cms/login'.