Upload the plugin folder turnstile into your Cotonti plugins directory: Setup is very simple, just add the following validation field to login and input fields like register, comment.
<!-- Cloudflare Turnstile Captcha -->
<!-- IF {USERS_AUTH_VERIFY_IMG} -->
<tr>
<td colspan="2" class="textcenter">
{USERS_AUTH_VERIFY_IMG}
{USERS_AUTH_VERIFY_INPUT}
</td>
</tr>
<!-- ENDIF -->
Github: Cloudflare Turnstile Plugin
Plugin Page: Cotonti Cloudflare Turnstile Plugin