+1 I’d like to see U2F support as well.
Gitlab supports U2F by requiring users who want to leverate it to sign up for 2-factor authentication first… then if the user is unable to log-in via a U2F dongle (not accessible, browser lacks support, etc), they can do the normal authy/authenticator 2-factor.
U2F dongles are also getting cheap. Amazon.com: FIDO U2F Security Key, Thetis [Aluminum Folding Design] Universal Two Factor Authentication USB (Type A) for Extra Protection in Windows/Linux/Mac OS, Gmail, Facebook, Dropbox, SalesForce, GitHub : Electronics