Build a Simple Web App with Google Analytics API and Google App Engine

I need someone to create a simple web app that connects to a users Google Analytics account and displays a few stats onto a page. The flow that you will need to create: 1) Visitor will visit our site and click 'Authorize Now' button that brings them to a Google page where they can authorize our access to their Google Analytics data. 2) A web app built on Google App Engine will store the required data and run some computations on the data in python. (This is just a simplified model so the code would just be something like 'If last month's visitors were higher than this month's display message X', etc) 3) After clicking 'Authorize Now' the visitor will be taken to a page where the output from GAE will be displayed.