 return self.failure_handler(
                FailureArgs(
                    request=request,
                    reason=&#34;missing_code&#34;,
                    suggested_status_code=401,
                    settings=self.settings,
                    default=self.default_callback_options,
                )
            )

        installation = self.run_installation(code)
        if installation is None:
            # failed to run installation with the code
            return self.failure_handler(
  