All modules
Securitytwo-factor-auth · 1.4.2
Two-Factor Authentication
TOTP-based 2FA with backup codes for enhanced account security
Installing it
From the running site: Admin, then Modules, then Marketplace. Pick it and the app installs, migrates and rebuilds itself. Anything it depends on is installed with it.
$ curl -fsSL https://blysis.com/install.sh | sudo bash