Change gapi.class 1.3 to work with oauth instead of authsub

I have a class called [login to view URL] 1.3. This is an amazing class. It can be downloaded online just search google. Problem I have it this class works with AUTHSUB AND I NEED IT TO WORK WITH OAUTH 2 because google will stop authsub in 2015. here is a snippet of the code below. Currently it works with your google analytics username and password. I want it to work with authsub instead! I still want to use the class I just want the authentication to change from authsub to oauth. NB - PLEASE ONLY BID IF YOU KNOW WHAT I AM TALKING ABOUT. ALSO PLEASE GIVE A BRIEF DESCRIPTION OF YOUR UNDERSTANDING OF THIS PROJECT. $ga = new gapi('','password'); $ga->requestReportData( profileid,array('browser','browserVersion'),array('pageviews','visits')); foreach($ga->getResults() as $result) { echo '<strong>'.$result.'</strong><br />'; echo 'Pageviews: ' . $result->getPageviews() . ' '; echo 'Visits: ' . $result->getVisits() . '<br />'; } echo '<p>Total pageviews: ' . $ga->getPageviews() . ' total visits: ' . $ga->getVisits() . '</p>';