Minecraft login is not xd?

Moin, I have the following problem;

I just started to create an old account out of spell, then using an authenticator so logged in to Minecraft and then but I reschedule.

I wanted to log in again to my correct account, which did not work anymore, although the email and password were correct. The error message from the wrong password / email always comes back.

I suspect it's the authenticator, but how do I undo it?

Maybe the authenticator is still running in the background.
Take a look at the task manager

Already looked, there's nothing left.