black23

 Purpose of of [non text link](https://www.w3.org/TR/WCAG21/#dfn-programmatically-determinable). [Bypass block](https://www.w3.org/WAI/WCAG21/Techniques/html/H64): title of iframe

I'm just user, not programmer. Sorry.

I'll try to ask my devel man :-)

It would be pluginable, because there are many SSO ways like Shibboleth, OpenID etc.

Google Authentificator, Yubikey

It's not same like SSO. Its second layer of sing-in procedure. SSO It's one login information fo many systems. 2 way (factor) autehntification is one code thath system ask on...

+1

It can be optional feature.