In order to authenticate yourself to our Gitlab server, you need to setup your ssh key. If you have already setup a key (eg. for Github), you can use this existing key. Otherwise if you don't have a key yet, or need to create a new one, please follow this official documentation on how to create a key: https://docs.gitlab.com/ce/ssh/README.html
Add new key To add a new key, log into your Academy Gitlab account and open your settings. You can access them by clicking on your profile icon at the top right corner and click settings in the menu drop-down. Then, in the settings section, click on SSH keys in the top menu and add your public key.