Cannot login to shopware store

cannot login with these forms
https://store.shopware.com/en/checkout/confirm
https://store.shopware.com/en/account/login/sTarget/index/sTargetAction/index

i am asked for a login which is not defined

what i am trying to do, is to download some extensions from the shopware store

Did you register you store within the installation process or on shopware.com?

maybe i haven’t registered the store yet