What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Unfortunately there are no direct systems to use as a loging system for your form. Also, there is no way you can use our forms for web authentications.
Nevertheless utilizing your Form's Source Code you may be able to integrate your form to your site's login system. Do keep in mind that Jotform does not support or allow login forms. Your account may be suspended if you create these kind of forms. So login usability is very limited, depending on what you are trying to achieve.
If you need further assistnace, do let us know. Thank you.