public async Task SaveTraderAsync(Trader trader)
        {
            var           item       = Mapping.Mapper.Map <TraderAdapter>(trader);
            TraderAdapter checkExist = await _traderAdapter.Find(x => x.Identifier.Equals(item.Identifier)).FirstOrDefaultAsync();

            if (checkExist != null)
            {
                await _traderAdapter.ReplaceOneAsync(x => x.Identifier.Equals(item.Identifier), item);
            }
            else
            {
                await _traderAdapter.InsertOneAsync(item);
            }
        }
        public async Task SaveTradersAsync(List <Trader> traders)
        {
            var items = Mapping.Mapper.Map <List <TraderAdapter> >(traders);

            foreach (var item in items)
            {
                TraderAdapter checkExist = await _traderAdapter.Find(x => x.Identifier.Equals(item.Identifier)).FirstOrDefaultAsync();

                if (checkExist != null)
                {
                    await _traderAdapter.ReplaceOneAsync(x => x.Identifier.Equals(item.Identifier), item);
                }
                else
                {
                    await _traderAdapter.InsertOneAsync(item);
                }
            }
        }