'Golfe' is correct. I use this on international places.
So I put Golfe in the Username field and my entire german email in the password field and it says 'Incorrect username and/or password.'

Maybe the @ breaks the password system?

Unable to confirm security token. A likely cause for this is that some time passed between when you first entered the page and when you submitted a form or clicked a link. If that is the case and you would like to continue with your action, please click the Confirm button. Otherwise, you should click the Cancel button to return to where you were.

Warning! The following errors must be corrected before a new password can be sent:

    There is no user registered with the email address ********@gmx.de

Well, I think it's because the typo ********@fmx.de I wrote last time.
Sorry for that, please add me again.

Edit:

Now I can't have my username back... Sorry for braking the system that hard

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