Second factor support

[runningman84]

It would be great to use this with a yubikey or similar device

[ms-jpq]

Oh hey, I didn't expect to see a response so soon!

I will defintely consider adding that in if its not too much work.

Will just be under another top level YAML field, something like:

integrations:
  yubikey: ...

and integrate that into the RBAC