Scanning QR code to sign in. Simple functionality that links an account on a smartphone app to your desktop/other devices by scanning QR code, like Whatsapp. Se

Scanning QR code to sign in. Simple functionality that links an account on a smartphone app to your desktop/other devices by scanning QR code, like Whatsapp. Seems straightforward and I wonder if that can be brought on to authentication frameworks, without us having to deal with usernames and passwords. 'Giving' something access feels cooler than 'requesting' something access.