public async Task SaveRanking(Ranking ranking)
        {
            if (ranking.Id == 0)
            {
                await context.AddAsync(ranking);
            }
            else
            {
                context.Entry(ranking).State = Microsoft.EntityFrameworkCore.EntityState.Modified;
            }

            await context.SaveChangesAsync();
        }
        public async Task SaveRoom(Room room)
        {
            if (room.Id == 0)
            {
                await context.AddAsync(room);
            }
            else
            {
                context.Entry(room).State = Microsoft.EntityFrameworkCore.EntityState.Modified;
            }

            await context.SaveChangesAsync();
        }