wikibase-cli: login does not work

Hey, stupid issue, I know… but… when I try to create an entity using wb create-entity new.json I always get the error message claiming I am not logged in. failed to login: invalid username/password undefined However, I am logged in, which I checked by wb config:

{
  "instance": "https://www.wikidata.org",
  "credentials": {
    "https://www.wikidata.org": {
      "username": "X@Y",
      "password": "lmnopqrst"
    }
  },
  "bot": true
}

What can be the reason? Sorry, for this basic issue but I running mad about this.