logger = $logger; $this->subjectReader = $subjectReader; $this->coreHelper = $coreHelper; $this->messageManager = $messageManager; } /** * @param array $handlingSubject * @param array $response */ public function handle(array $handlingSubject, array $response) { if (isset($response['status']) && !$response['status']) { $this->messageManager->addErrorMessage( __('Unable to cancel the order or the Amazon Order ID is incorrect.') ); } else { $this->messageManager->addSuccessMessage(__('Successfully cancelled Amazon Pay.')); } } }