[Flutter] 에러 메시지 나타내기

  onError: (error) {
    // BaseClient.handleApiError(error);
    // apiCallStatus = ApiCallStatus.error;
    // update();
    if (error.response?.statusCode == 400) {
      String errorMessage = (error.response?.data['message'] as List)?.first as String ?? "Default Error Message";
      Fluttertoast.showToast(msg: errorMessage);
    } else {
      Fluttertoast.showToast(msg: "An error occurred: ${error.message}");
    }
  },