Filters in route not working in codeigniter 4.0.4

i'm using 4.0.4 and filter works on a specific route.


But i put my filter class in app/Filters directory.

Then i edit app/Config/Filters.php

eg

Code:

    public $aliases = [


'myfilter3'=> \App\Filters\MyFilter3::class,


......

public $filters = [
    



'myfilter3' => ['before' => ['removeBlog']],


//the nitty gritty of MyFilter3.php is

  session_start();
  $logic=isset($_SESSION['role']) ;

{
//logic

}