Login beginning of the quiz (prevent infinite re-takes)

So I was wondering if we can include login/password at the beginning of the quiz, so the user can close the window and resume later at his convenience.

Of course, this would be very helpful to prevent the user of closing the window at the end of the quiz and take the quiz again.

PS: I do set up already password to access the quiz, but it is a "generic" password, just to prevent people from outside the company of accessing the content (it is located on our internal server and accessed via ***.com/quiz/***

Thank you in advance!