Why is it asking for Google or Facebook login?

Why is it asking for Google or Facebook login? can we give a unique login id and password

You can always log in with a separate username and password. Google and Facebook logins are always optional. However, if you have already logged to any of these two, you have to initiate a reset password to create a new password for the account. 

https://www.jotform.com/help/489-How-to-reset-JotForm-account-password

Once the password is changed, you can now log in with your username and password. Your username is sarika.maindan. 

If you want to update your username, go to the profile section of your account.

https://www.jotform.com/help/526-How-to-Change-the-Username