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

            _traderAdapter.Upsert(item);
        }
        public async Task SaveTradersAsync(List <Trader> traders)
        {
            var items = Mapping.Mapper.Map <List <TraderAdapter> >(traders);

            foreach (var item in items)
            {
                TraderAdapter checkExist = _traderAdapter.Find(x => x.Identifier.Equals(item.Identifier)).FirstOrDefault();
                _traderAdapter.Upsert(item);
            }
        }