Update TeachingHub.md

TeachingHub.md

@@ -88,7 +88,8 @@ Google Auth (https://play.google.com/store/apps/details?id=com.google.android.ap
 ...
 ```
 You need to download one of these apps:
-- [Authy](https://authy.com/download/)
+- [2FA Authenticator](https://2fas.com) :rocket: (android, ios)
+- [Authy](https://authy.com/download/) 
 - [FreeOTP](https://freeotp.github.io/)
 - [Google Auth](https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2)
 - or any other (search `2fa apps` and you will find plenty)