使用GAPI创建包含综合浏览量和唯一身份访问者的报告

I'm using GAPI to try and create simple reports from our Google Analytics data. My internal customer would like to see an overview with 2 fields per page: pageviews and unique visitors. I have the pageviews part working, but I cannot get the unique visitors part to work. This is my current code. The filter would be a parameter they can change, but is hardcoded for now:I'm using GAPI to try and create simple reports