public override string GetUserNameByEmail(string email)
        {
            string username = String.Empty;
            _UserRep = BootStrapper.GetCurrentUserRepository();
            tUser user = _UserRep.GetSingleByEmail(email);
            if (user == null) {
                return String.Empty;
            } else {
                username = user.UserName.Trim();
            }

            return username;
        }