There&#x27;s a reason: it generates unique input data for each user, presumably to prevent a given user&#x27;s answers from being reused. If you have a Github account, it&#x27;s trivial to authenticate and doesn&#x27;t request undue privileges with your account. (That&#x27;s what I used.) Up to you whether that&#x27;s too high a bar, but IMO it&#x27;s really not asking a whole lot.