public JsonResult GetAllByGamerNickname(string nickname)
        {
            if (!(Session["gamer"] is Gamer))
            {
                return(Json(string.Format(Errors.GamerWithNicknameNotLoggedIn, nickname), JsonRequestBehavior.AllowGet));
            }

            var gameResultDtoList = _gameResultService.GetAllByGamerNickname(nickname).ToList();

            var gameResultListViewModel = Mapper.Map <IEnumerable <GameResultViewModel> >(gameResultDtoList);

            return(Json(gameResultListViewModel, JsonRequestBehavior.AllowGet));
        }