public async Task <bool> Handle(ChangeOrSetAmountCommand request, CancellationToken cancellationToken)
        {
            await UpdateAsync(Guid.Parse(request.Id), async payment =>
            {
                payment.SomeNotNull()
                .Match(p => PaymentTransaction.ChangeOrSetAmountTo(p,
                                                                   Money.Create(request.Amount.Value, request.CurrencyCode.Value)
                                                                   ), () => throw new AggregateNotFoundException());
            });

            return(await Task.FromResult(true));
        }