title: why WordPress login button not taking custom recaptcha button response token
body: <p>I am using the code provided at <a href="https://megabyterose.com/2018/07/put-googles-invisible-recaptcha-on-wordpress-login-without-a-plugin/" rel="nofollow noreferrer">Put Google’s Invisible reCAPTCHA on WordPress Login Without a Plugin</a> for the login page.
  everything goes well when someone submits the form by hitting keyboard enter but with login button click <code>$_POST['g-recaptcha-response']</code> become empty.
  I think the login button uses JavaScript.
  Any way to fix it? Thank you.</p>