controller.checkFolderExists = function (folder) {
        //try
        try {
            //check
            if (!fs.existsSync(folder)) {
                //debug
                app.logger.info('config - utils - checkFolderExists - create folder: ' + folder);
                //create
                fs.mkdirSync(folder,{ recursive: true });
                return true;
            } else {
                return true;
            }
        } catch (error) {
            //logger
            app.logger.error('config - utils - checkFolderExists - ' + error);
            return false;
        }
    };