Setting up an SSH key in GitLab

Start by installing the GitLab CLI:

# Or your equivalent
brew install glab

Log in to your account:

# Answer the questions to log into gitlab.com or other
glab auth login

Approve the OAuth request in the web browser.

Add an SSH key using glab ssh-key add:

# Requires a path to a key as a positional argument, and a title.
glab ssh-key add ~/.ssh/id_rsa.pub --title "My Machine"

See the documentation for the GitLab CLI.