How to add Google recaptcha v3 to your site?

Adding Google recaptcha support for the back end is easy and simple - read below.
1.) go to https://www.google.com/recaptcha/admin/create
2.) (1) Enter a name for your project. (2) Select reCAPTCHA v3. (3) Enter your domain name. (4) Accept the rules (5) Click "SUBMIT"
How to add Google recaptcha v3 to your site
3.) (1) copy SITE KEY to value of constant RECAPTCHA_SITE_KEY in you db.inc.php config file (2) copy SECRET KEY to value of constant RECAPTCHA_SECRET_KEY in you db.inc.php config file
How to add Google recaptcha v3 to your site
4.) The end ;) Everything will be fine ;)