in Typo3 v9 the secret shows only when opening the user profile at the top panel
When one opens the user management from the side panel and then opens the currently logged in user, there is no way to see the QR code.But it is possible to switch on the authenticator. One has to be careful NOT to enable the Plugin without knowing the invisible secret, as you will be locked out from your account. Maybe put this into the Readme.md? Also, would it be feasible to adapt for v10?, ( well, thats actually not an issue, just curiosity).