The computer names the phone and asks for the two-digit number the phone shows, so a code seen over somebody’s shoulder is no use to them, and the phone asks before it signs in as you. A code lasts two minutes and works once.
Sign in on your phone with a code from your computer
Sign in on your phone, in Kemble Work’s workspace menu, shows a code your phone’s camera opens; the computer confirms which phone it is, and the phone is signed in without typing an address or password.