public static List <LeaderModel> GetOrderedLeaders(LeaderboardModel leaderboard)
        {
            var leaders = new List <LeaderModel>();

            if (string.IsNullOrWhiteSpace(leaderboard?.Leaders))
            {
                return(leaders);
            }

            return(JsonConvert.DeserializeObject <List <LeaderModel> >(leaderboard.Leaders).OrderByDescending(x => x.Points).ToList());
        }
        public static List <LeaderModel> InsertLeader(LeaderboardModel leaderboard, LeaderModel leader)
        {
            var list = GetOrderedLeaders(leaderboard);

            list.Add(leader);
            list = list.OrderByDescending(x => x.Points).ToList();

            if (list.Count > 10)
            {
                return(list.Take(10).ToList());
            }
            return(list);
        }