I want to do something when csrf validation failed in controller,

I am having a hard time figuring this out,

Check out the code below,

View => csrf.php,

<?= session()->getFlashdata('error') ?>
<form method="post" action="<?=base_url('/test_csrf')?>">
    <?= csrf_field() ?>
    <label for="name">Name:</label>
    <input type="text" name="name" id="name">
    <br>
    <label for="email">Email:</label>
    <input type="email" name="email" id="email">
    <br>
    <button type="submit">Submit</button>
</form>

Controller => Welcome.php,

<?php

namespace AppControllers;

use CodeIgniterSecurityExceptionsSecurityException;

class Welcome extends BaseController
{
    public function __construct()
    {
        // $this->middleware('MyFilter');
    }
    public function index()
    {
        echo 'Hello, this is your first controller in CodeIgniter 4!';
    }

    public function csrf(){
        return view('csrf');
    }

    public function test_csrf(){
        // do something when csrf failed here.
    }
}