public async Task UpdateRoundAsync(Round round)
        {
            if (!_context.Rounds.Contains(round))
            {
                await _context.Rounds.AddAsync(round);

                await _context.SaveChangesAsync();
            }
        }
        public async Task UpdateTeamAsync(Team team)
        {
            if (!_context.Teams.Contains(team))
            {
                await _context.Teams.AddAsync(team);
            }
            else
            {
                await _context.Answers.AddRangeAsync(team.Answers.Except(_context.Answers));
            }

            await _context.SaveChangesAsync();
        }