Changing the QR/password and email

At the moment the QR code is being refreshed every 3 days and it takes a lot of time away from all the managers who got a lot of scholars.

So i would like to propose that we can change the QR code and also the password and email through a sign message from the wallet.

That way we don't have to give out new QR code every 3 days it will save a lot of time and when password and email need to get changed we can do that also right away in case a scholar stops playing.