In this class, we recommend using SSH to manage git. On each device you need to use git, please perform the following on each device you wish to use git from:
ssh-keygen # It is safe to accept the defaults here
cat ~/.ssh/id_rsa.pub # Copy this to your clipboard
With this in your clipboard, go to this page: https://github.com/settings/keys
Click "New SSH Key" and paste in your key.