The first thing you need to do is go to your command line and follow the instructions to generate your SSH key pair.
This is a companion discussion topic for the original entry at https://docs.gitlab.com/ee/gitlab-basics/create-your-ssh-keys.html
This is a companion discussion topic for the original entry at https://docs.gitlab.com/ee/gitlab-basics/create-your-ssh-keys.html
I suggest to add brute-force protection to your ssh-keys using -a 100. Crypting your passphrase will iterate a few seconds each session.
ssh-keygen -t ed25519 -a 100 -C "<comment>"
ssh-keygen -t ed25519 -a 100 -C "<comment>"