docs/mfa.md

@@ -7,10 +7,13 @@ include_toc: true
 
 ## Supported configurations
 
-- TOTP authenticators
+- TOTP authenticators (having multiple is supported)
+- Yubikey (having multiple keys per account is supported)
 - TOTP + recovery codes
+- Yubikey + recovery codes
+- Yubikey + TOTP + recovery codes
 
-TODO: yubikeys, one-time recovery code via email
+TODO: one-time recovery code via email
 
 ## Implementation details