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You can not receive passwords from users to enter the form. But, you can do it with a very similar way.
You can set a text field in your form and then you can use conditions to hide or show the form fields according to the text in it.
Please find the example form that I have created for you to test: https://form.jotform.com/6326126525896 If you prefer, you can clone and modify it on your side.
The example form keyword is Test1234
Please find the screenshot below to check the conditions:
Also, please try to avoid using such words "password" or "username" in your form. Because our automatic phishing detection system could suspend your account when detecting these words.
Please try and if you need any further assistance, let us know.
Thanks in advance.
As your new question is different from this topic, I've split your message.
You can see the answers by following this link.
If you need further assistance, please don't hesitate to ask.