public IActionResult UpdatePlayer(int id, [FromBody] PlayerInputJson json)
        {
            var player = DB.Players.Find(id);

            if (player == null)
            {
                return(NotFound());
            }
            player.CopyPropertiesFrom(json);
            DB.SaveChanges();
            return(GetPlayer(id));
        }
        public IActionResult AddPlayer([FromBody] PlayerInputJson json)
        {
            var newModel = new Player()
            {
                Timestamp = DateTime.UtcNow
            };

            newModel.CopyPropertiesFrom(json);
            DB.Players.Add(newModel);
            DB.SaveChanges();
            return(GetPlayer(newModel.Id));
        }