private static void DeserializeJson()
        {
            JSONManager manager = new JSONManager();

            manager.Deserialize(filePath + @"\\input.json"); // change the name of file from here if needed
            AllPlayers     = manager.allPlayers;             // deserialization to player and tournament lists
            AllTournaments = manager.allTournaments;
        }
        private static void SerializeToJson()
        {
            JSONManager manager = new JSONManager();

            manager.Serialize(ResultsList, filePath);
        }