https://hiveblocks.com/@erh.germany

Owner
STM7AcT5VjXrADgH9oLYi3geECaUKnNGAp1VqfTE9nVCTRqjkYYJm

Active
STM7HrdrdK528qLLSjWvLiu2eLa323jbJaaWWrtDU4gJNssNdTSsZ

Posting
STM8Sceuhq6xop1BnK7jwRtEhqwq5zqWHdgKdc59vRKyqTtRrxvzt

Memo
STM7UUbsp4watLMUbHbWnzfAgd8LwP32oupxronfo9idCid87v1ve

These are your public keys as they exist on the blockchain for everyone to see.

Your goal is to see if you can find matching private keys that can generate these public keys.

https://hivetasks.com/key-generator

You say you have a master key so copy/paste that at this website with your correct username erh.germany

If the keys your master key + username creates match the public keys listed above then you'll have all the correct keys. If not it's the wrong master-key/username combination.