Source (for any platform with python installed)
Manually getting your key (without the tool)
GitHub has great guides to the manual process
Your public key is usually located on your local development machine at C:\Users\YourUserName.ssh\id_rsa.pub (windows), /Users/YourUserName/.ssh/id_rsa.pub (mac), or /home/YourUserName/.ssh/id_rsa.pub (linux).
Note that .ssh is usually a hidden folder, so you may have to enable “hidden folders and files’ in Windows Explorer, or use shift-command-G on mac and enter “~/.ssh/”
If you’ve never worked with Git or ssh before, your key probably doesn’t exist yet.