code: def make_success_redirect(self):
      
      new_authorization_code = AuthorizationCode.objects.create(
          user=self.user,
          client=self.client,
          redirect_uri=(self.redirect_uri if self.request_redirect_uri else None)
      )
      new_authorization_code.scopes = self.valid_scope_objects
      new_authorization_code.save()
  
      response_params = {'code': new_authorization_code.value}
      # From http://tools.ietf.org/html/rfc6749#section-4.1.2 :
      #
      #     REQUIRED if the "state" parameter was present in the client
      #     authorization request.  The exact value received from the
      #     client.
      #
      if self.state is not None:
        response_params['state'] = self.state
      return HttpResponseRedirect(
          update_parameters(self.redirect_uri, response_params))
docs: Return a Django ``HttpResponseRedirect`` describing the request success.
  
      The custom authorization endpoint should return the result of this method
      when the user grants the Client's authorization request. The request is
      assumed to have successfully been vetted by the :py:meth:`validate` method.