Can pull for Git repo but not push

I just generated an SSH key and added it to my ssh-agent in a Linux Mint terminal. I think copied the content of the .pub file and pasted into the GitHub repo box to add the key. The repo accepted the key, everything seems to be working. I call git pull and it works. I call add and commit and everything seems fine.

But then I call git push -u origin main and I get

ERROR: Permission to axiomtutor/axiomtutor.git denied to deploy key  fatal: Could not read from remote repository.    Please make sure you have the correct access rights  and the repository exists.  

https://stackoverflow.com/questions/66913523/can-pull-for-git-repo-but-not-push April 02, 2021 at 09:46AM