Error at start of tutorial.js

[mwolleben]

Authenticating with Google Cloud...
module.js:540
throw err;
^
Error: Cannot find module 'google-cloud'
at Function.Module._resolveFilename (module.js:538:15)
at Function.Module._load (module.js:468:25)
at Module.require (module.js:587:17)
at require (internal/module.js:11:18)
at Object. (/home/maik_wolleben/google-cloud-datastore-tutorial/tutorial.js:13:14)
at Module._compile (module.js:643:30)
at Object.Module._extensions..js (module.js:654:10)
at Module.load (module.js:556:32)
at tryModuleLoad (module.js:499:12)
at Function.Module._load (module.js:491:3)

[jryd]

Did you run npm install to install your dependencies?