Yesterday I learned how to create a two-factor authentication can used by Google and Microsoft authenticator apps. And I think: "Why not create a package for Fuelphp? Because there is no in the web". So, I create a fuelphp package (Working on 1.7.3, I don't now for old version)
The project is not finished but it's working fine, the tutorial is on the README.md. It's my first package, so, if you have comment, or spelling corrections, do not hesitate: contact me ;)