Google Analytics API, Kettle question

Does anybody have experience getting Google Analytics Data API using Kettle? I downloaded the latest version of Kettle/Spoon and trying to figure out what API key needs to be used. I've gone through the Google Developer Console and activated the Analytics API but I'm not sure which credentials to use - OAuth or the Public Access API Access? I've checked the Pentaho wiki but it seems like it might be outdated. Will the OAuth credentials give me am API key that I can fill into the Spoon Google Analytics Input (see attached)? FYI I'm fairly new to ETL and using API's, any help would be appreciated!

Thanks

Screen Shot 2014-02-04 at 3.57.05 PM.jpg

Attached Images

• Screen Shot 2014-02-04 at 3.57.05 PM.jpg (30.6 KB)