model.unread = res.val();
                    if (model.unread.pm == null) {
                        model.unread.pm = 0;
                    }
                    if (model.unread.tm == null) {
                        model.unread.tm = 0;
                    }
                    if (user.role().isTM()) {
                        model.unread.user++;
                        model.unread.pm++;
                    } else if (user.role().isUser()) {
                        // model.unread.system++;
                        model.unread.pm++;
                        model.unread.tm++;
                    } else if (user.role().isQA()) {
                        model.unread.user++;
                        model.unread.tm++;
                    } else if(user.role().isSA()){
                        model.unread.user++;
                        model.unread.tm++;
                        model.unread.pm++;
                    }