I'm new to stormpath and building an application on GAE. I was able to manage to get it working, but not without quite a bit of frustration and workarounds (documented here: https://gist.github.com/jcjones1515/40a50594fcccd74bca49509f74f3d33a).
It would be helpful if there were some app engine specific documentation out there that was easily findable. There are quite a few old workarounds that come up through google that are misleading.
Also, the call to platform.platform() could be corrected to eliminate the need to monkey patch.