With the new requirement of having to log in with user@domain this website can be used to create user and carriage return and password in one go for smooth one scan login:

 http://zxing.org/w/chart?cht=qr&chs=350x350&chld=L&choe=UTF-8&[email protected]%0D123456

Will execute:

User [enter] 

Pwd [enter]

in one go