void postRequestFunction() async {
    if (...) {
      showAlertDialog(context);
      ...URL cleanup code
      ...Document cleanup code
      try {
        // Send request code
        if (res.statusCode == 200) {
          Navigator.of(context, rootNavigator: true).pop();
          print(resBody);
          Navigator.push(context,
              MaterialPageRoute(builder: (context) => ValidarTokenSMS()));
        } else {
          Navigator.of(context, rootNavigator: false).pop();
          Alertify(
            content: body,
            context: context,
            isDismissible: true,
            title: title,
            alertType: AlertifyType.warning,
            buttonText: 'Ok',
            animationType: AnimationType.outToIn).show();
        }
      } catch (error) {
        await utils.reportError(error);
      }
    } else {
      Alertify(
        content: body,
        context: context,
        isDismissible: true,
        title: title,
        alertType: AlertifyType.warning,
        buttonText: 'Ok',
        animationType: AnimationType.outToIn)
      .show();
    }
  }