public void AddPlayer(Player player, string connectionString)
 {
     using (BennetBasketballDb db = new BennetBasketballDb(connectionString))
     {
         db.Players.Add(player);
         db.SaveChanges();
     }
 }
        public void AddRegistration(Guardian guardian, Player player, string connectionString)
        {
            int? guardianId = guardian.Id;

            if (guardianId == null)
            {
                GuardianAccessor guardianAccessor = new GuardianAccessor();
                guardianId=guardianAccessor.AddGuardian(guardian, connectionString);

            }

            PlayerAccessor playerAccessor = new PlayerAccessor();

            player.GuardianId = guardianId;
            playerAccessor.AddPlayer(player, connectionString);
        }