Help me get the author to publish his course! backend cert

trying to learn do the node portion of the backend cert but the author doesn’t even have the course published? how can i get this work.

sethdcd:~/workspace $ npm install -g learnyournode
npm ERR! Linux 4.9.17-c9
npm ERR! argv “/home/ubuntu/.nvm/versions/node/v6.11.2/bin/node” “/home/ubuntu/.nvm/versions/node/v6.11.2/bin/npm” “install” “-g” “learnyournode”
npm ERR! node v6.11.2
npm ERR! npm v3.10.10
npm ERR! code E404

npm ERR! 404 Registry returned 404 for GET on
npm ERR! 404
npm ERR! 404 ‘learnyournode’ is not in the npm registry.
npm ERR! 404 You should bug the author to publish it (or use the name yourself!)
npm ERR! 404
npm ERR! 404 Note that you can also install from a
npm ERR! 404 tarball, folder, http url, or git url.

npm ERR! Please include the following file with any support request:
npm ERR! /home/ubuntu/workspace/npm-debug.log

It is learnyounode not learnyournode.

thanks! durrrrrrrrrr