Wp reCaptcha with Membership 2 Pro [Urgent - Spammed]

Hello, I'm getting spammed by subscriptions to my WP

I see an add-on in Membership 2 pro called "WP reCaptcha Integration : Integrate WP reCaptcha to use this Add-on" with a link to https://wordpress.org/plugins/wp-recaptcha/

However this link is a 404

So which recaptcha plugin do we need to install to integrate with memberships ?

Thank you