public JsonResult GetOtherUsers()
        {
            string      emailId = GetEmailIdAndRefreshUserSession(false);
            List <User> users   = DALayer.GetAllUsers(emailId);

            users.ForEach(x => x.LastSeenDiff = (DateTime.UtcNow - x.LastSeen).TotalSeconds.ToString());
            return(Json(users, JsonRequestBehavior.AllowGet));
        }