reCaptcha?

Can you tell me how to setting up reCaptcha? I can't finde anything at the settings. I really need this feature because I'm getting a lot of spam users. So I was looking for another Kunena theme.

Hi,
Sorry about delay. Did you show the reCaptcha on your site? Let's us know if still not show on your site, we will help you check the problem.

Best regards,