Add a captcha form to the woocommerce register form

I finally found there is a hook that someone added:

<?php do_action( 'register_form' ); ?>

I found this in the git repo

Hope that line of code will help someone who struggles finding the answer i did

—-EDIT—-

When i looked into this more carefully the fix i did was add this plugin:

https://wordpress.org/plugins/easy-captcha/

This then allows you to select where you want the captcha form to appear