How to use SSH key to commit as collaborator on GitHub?

Question

I'm a collaborator on a private Github repo (owned by someone else), and although I have added an SSH key to my own GitHub account which allows me to authenticate when accessing my own repositories, it always asks me for my password when I try to access the repository on which I am only a collaborator.

Do you have any idea why it doesn't authenticate me with my SSH key?

I have tried to add my key as a "deploy key" to the shared repo itself, but GitHub always rejects my submission, with the error message "Key is already in use.".

My remote looks like the following:

$ git remote -v
origin  https://example-user@github.com/example-owner/example-project.git (fetch)
origin  https://example-user@github.com/example-owner/example-project.git (push)

Answer 1

You've added the github repo as HTTPS instead of via SSH, your URL should look something like this

git@github.com:example-owner/example-project.git

If you check the right of the repo on github, you should see options to get the via HTTPS, SSH, or subversion.