There is something strange about the user.register.post.post_process. Even putting something simple like: event.response.content.foo = 'bar'; foo does not return to the request.
Making a var_dump (event.response.content); foo value appears on the console "tail -f ../apps/dreamfacotry/htdocs/storage/logs/dreamfacotry.log" . The same thing happens if I do a var_dump (platform.session.user)
I will investigate further, and any news notice here. If I get to conclusion which is really a bug, I will open an issue in Git Hub.
My DreamFactory Version: 2.1.0