title: AttributeError: 'WSGIRequest' object has no attribute 'request' on OAuth2Decorator
body: <p>I ran into an issue using Django on Google App Engine trying to access Google API.</p>
  
  <p>I want to use the decorator, as described in the docs, but I get the same error over and over again:</p>
  
  <pre><code>AttributeError: 'WSGIRequest' object has no attribute 'request'
  </code></pre>
  
  <p>And the StackTrace:</p>
  
  <pre><code>Internal Server Error: /
  Traceback (most recent call last):
    File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/lib/django-1.5/django/core/handlers/base.py", line 115, in get_response
      response = callback(request, *callback_args, **callback_kwargs)
    File "/Users/johannes/GitHub/itzehoe/dependencies/oauth2client/appengine.py", line 703, in check_oauth
      self._create_flow(request_handler)
    File "/Users/johannes/GitHub/itzehoe/dependencies/oauth2client/appengine.py", line 734, in _create_flow
      redirect_uri = request_handler.request.relative_url(
  AttributeError: 'WSGIRequest' object has no attribute 'request'
  </code></pre>
  
  <p>And some code:</p>
  
  <pre><code>from google.appengine.api import users
  from oauth2client.appengine import OAuth2DecoratorFromClientSecrets
  
  from django.shortcuts import render
  from django.conf import settings
  
  decorator = OAuth2DecoratorFromClientSecrets(settings.GOOGLE_CLIENT_SECRETS,
                                               'https://www.googleapis.com/auth/admin.directory.group')
  
  
  @decorator.oauth_required
  def index(request):
      context = {}
      return render(request, 'index.html', context)
  </code></pre>