How can I require a password to use the form?

Unfortunately, we do not allow the word "Password" as a field title since we have a phishing detector system that may flag your form as a phishing one.

You may use something different like "Verification code", and create a condition to enable the submit button if the code entered is correct, example:

You can try my form here: https://form.jotform.co/60405724757862 

Let us know if you need more help.