This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
Configuring TYPO3 felogin extension to use YubiKey¶
If you have enables YubiKey Authentication for frontend users, you have to add an extra field to your felogin template.
First you have to configure felogin, so it uses an own template.
styles.content.loginform.templateFile = fileadmin/templates/ext_felogin/template.html
Then you must add the following HTML to the ###TEMPLATE_LOGIN### section right after the password field.:
<div> <label for="t3-yubikey">YubiKey</label> <input type="password" id="t3-yubikey" name="t3-yubikey" value="" /> </div>
Finally, you can add your own CSS Styles to the new field, so it looks like a YubiKey enabled input field.