User ID: None
USer does not exist
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Traceback (most recent call last):
  File "/home/dotcloud/env/local/lib/python2.7/site-packages/flask/app.py", line 1518, in __call__
    return self.wsgi_app(environ, start_response)
  File "/home/dotcloud/env/local/lib/python2.7/site-packages/flask/app.py", line 1506, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/home/dotcloud/env/local/lib/python2.7/site-packages/flask/app.py", line 1504, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/dotcloud/env/local/lib/python2.7/site-packages/flask/app.py", line 1264, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/dotcloud/env/local/lib/python2.7/site-packages/flask/app.py", line 1262, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/dotcloud/env/local/lib/python2.7/site-packages/flask/app.py", line 1248, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/dotcloud/current/webapp/app.py", line 70, in users
    users_collection.insert(user_dict)
  File "/home/dotcloud/env/local/lib/python2.7/site-packages/pymongo/collection.py", line 359, in insert
    continue_on_error, self.__uuid_subtype), safe)
bson.errors.InvalidStringData: strings in documents must be valid UTF-8