You can now access your repositories hosted on Cloudnode over HTTPS. This feature is now generally available and the recommended way. If you are happy with Git over SSH you can still use it. In the application details both clone URLs for SSH and HTTPS are shown.
Both methods require different authentications. SSH requires your public key to be uploaded where HTTPS uses your Cloudnode user name and your API key. That are the same credentials you are using for the API and the CLI.
Fig 1: Clone URLs