QR Code for customer signing into the APP

It would be great if there was a QR code option similar to how the 3CX mobile app works that a technician can pull up (within the technician app on the new customers account) and show to the customer to streamline them downloading the app, then the QR code automatically logs them in for the first time. Then the app can prompt them to create their own password, allow notifications, opt in for SMS, etc.