Aura Session 2.x – CSRF

I have a question if anyone had the opportunity to use Aura Session 2.x? If so, I need help …

My problem is that I have no idea what I’m supposed to call (?) For the CSRF to work. Unfortunately, but from the example I didn’t learn anything. I can’t apply it in practice.

Link to the example: Aura Session 2.x CSRF

Thanks in advance for any reply.

Source: stackoverflow-php