After you have installed the extension, you must configure it. You can find the reCAPTCHA settings under Theme My Login → reCAPTCHA.
Site Key & Secret Key
These keys are found in your Google reCAPTCHA Admin. In order to get keys for your site, you must follow the two steps outlined below.
NOTE: If you already have a site registered, proceed to step 2 by selecting your site from your list of registered sites.
Start by entering a label for your new site.
Next, select the type of reCAPTCHA. This should be reCAPTCHA v2.
Then enter the domains that the keys should be valid for.
Next, accept the reCAPTCHA Terms of Service, check whether you would like alerts or not and finally click "Register".
Once you click register, you will be taken to the page for that site.
On this page you will find your keys. You may need to click the red "Keys" toggle in order to see them.
Copy both the Site Key and Secret Key to your reCAPTCHA settings.
Select whether your want your reCAPTCHA to display using either the light theme:
Or the dark theme:
Show On Forms
Select this option to enable reCAPTCHA on your login form.
Select this option to enable reCAPTCHA on your registration form.