AVM FritzTools - Fritz!Repeater 1200 AX

Hi,
I’ve replaced an old, broken Fritz!Repeater from AVM with a newer Repeater 1200 AX.
This new Device will be now shown as a new device by the Fritz!Box Tools integration.

As usual, the Integration requires a Username and a Password… I could set the password, but I don’t see any way on how to get the username, which will probably be auto-generated, as it is the same with the Fritz!Box itself.

There’s no User-Management available in the WebUI of the repeater.
There’s only an option to change the Password.

So, There’s probably no way to configure the Fritz!Repeater … or?
Has someone managed to get this integrated?

Did you try root?

no, I haven’t - because from the Fritz!Box I know, that the user is usually auto-generated…

but yes, with “root” it seems to work.
This could maybe added to the documentation?