That's because the link urlifies without the trailing '!'. Add it back and you'll get the password prompt.
Indeed you are correct.
However, when it comes to this game I believe that the link that we have is correct.
That is being said without having knowledge of the 4 wallets of which we have no clue what the answer was (even though I have narrowed down my results).
EDIT: WTF is up with the quotes?
Seriously?