Is there a good tutorial available re: how to interact with the Google Analytics API within a Rails app? I've found this gist, but I'm not sure if every step listed in that gist is necessary.
If that is a good tutorial to follow, where can I download the "key_file" that's mentioned? I can't seem to find it within https://code.google.com/apis/console/. Also, where do I find out my API client email address / SERVICE ACCOUNT EMAIL?