@supermathie > I’m 100% agree with your solution.
Unfortunately, for the rest of the year, I don’t have the choice, I must have an hybrid solution: Local logins (with 2FA) + External logins (No 2FA for the moment). And both of them, account creation must be allowed.
To “minimize” error, “hide” via the Creation Link is the best way for me, for the moment.
@pfaffman > Thank you! That’s answer my question perfectly.
Thanks to both of you for your answers 