We are a form & survey building service used for data collection and we do not offer a feature for creating login systems. However, you could create an HTML signup form and connect it to your website on your own, as long as you are paying for a Gold subscription or higher. Basic plans are prohibited from creating login/signup forms.
What is a login system? A login system is the combination between a login/sign up form, a PHP script, an external database and a user backend. The PHP script is the bridge between the sign up page and the database.
From the above mentioned, the only thing we have in common with a login system is the ability to create a login/sign up web form. All of the other elements are outside the scope of our service.