Please make an integration to use Yubikey for MultiFactor authentication. Yubikey is one of the prime contributors on earth (in the protocol working groups with Microsoft, Google etc.) for writing multifactor authentication protocols. See the W3C Chairs for the WebAuthn Group: https://www.w3.org/2017/08/web-authentication-charter.html
Consider that they are in the "Enterprise Deployment Working Group" for the FIDO authentication protocol: https://fidoalliance.org/members/working-groups/