code: def auth(self, request):
          
          callback_url = self.callback_url(request)
  
          twitter = Twython(self.consumer_key, self.consumer_secret)
  
          req_token = twitter.get_authentication_tokens(
              callback_url=callback_url)
          request.session['oauth_token'] = req_token['oauth_token']
          request.session['oauth_token_secret'] = req_token['oauth_token_secret']
  
          return req_token['auth_url']
docs: build the request to access to the Twitter
          website with all its required parms
          :param request: makes the url to call Twitter + the callback url
          :return: go to the Twitter website to ask to the user
          to allow the access of TriggerHappy