How to integrate Google reCaptcha or built-in captcha on an Adaptive Form?

Someone created a form that uses Adaptive Form.

I want to include some sort of captcha function on the form.

1. I tried using the built-in captcha (Form => Captcha). I made sure the captcha field is ticked as required but I have no problems submitting the form even if the captcha field is blank.

2. I was looking at incorporating Google's reCaptcha and the best guide I've seen is this: https://www.practicalaem.com/2015/11/11/using-googles-recaptcha-in-aem/ But it doesn't really tell me how to include this new component into my existing setup.

Thanks very much for the help