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, we do not support authentication or normal login forms. We do not have features where you can authenticate the login credentials with the database.
You can still achieve this requirement by adding conditions in your form. Check this guide: http://www.jotform.com/help/196-How-to-Hide-or-Show-Multiple-Fields-at-Once-Based-On-a-Single-Conditional-Entry
Please be noted that creating forms with username / email and password will trigger our anti phishing system to suspend your account. You should be careful in choosing the labels of your form fields.