Setting up two-factor authentication

Go to Settings > Account & security and choose to set up two-factor authentication. Scan the QR code with an authenticator app such as Google Authenticator or 1Password, then enter the 6-digit code it shows to confirm. From then on you'll be asked for a code from the app each time you log in, in addition to your password.

The Two-factor authentication card on your dashboard opens the same setup screen.