- https://docs.github.com/en/github/authenticating-to-github/connecting-to-github-with-ssh/testing-your-ssh-connection
- https://stackoverflow.com/questions/46337566/why-is-github-asking-me-username-password-although-i-setup-ssh-authentication
SSH authentication only works with URL-s like this one: “git@github.com:<user>/<repo>.git“. Username (or anything like that) is not considered, just the public key.