code: def auth(self, request):
          
          client = self.get_evernote_client()
          request_token = client.get_request_token(self.callback_url(request))
          # Save the request token information for later
          request.session['oauth_token'] = request_token['oauth_token']
          request.session['oauth_token_secret'] = request_token['oauth_token_secret']
          # Redirect the user to the Evernote authorization URL
          # return the URL string which will be used by redirect()
          # from the calling func
          return client.get_authorize_url(request_token)
docs: let's auth the user to the Service