Duplicate [1.5+] Add Yubikey Support for 2FA

[JamieSinn]

I think it would be wonderful if we could use yubikey for our 2FA instead of a mobile app, as I know my phone does run out of battery often.

Dev site:
https://developers.yubico.com/php-yubico/

 

[Chris D]

This has been suggested previously:

https://xenforo.com/community/threads/add-yubikey-to-xf-1-5-two-step-verification.99955/