public async Task <bool> Handle(CreateInvestmentCommand message, CancellationToken cancellationToken)
        {
            //Prepare a new investment.
            try
            {
                var investment = Investment.FromType(
                    InvestmentType.FromName(message.InvestmentType),
                    message.ExchangeId,
                    message.BaseCurrency,
                    message.QuoteCurrency,
                    new Account(message.Username)
                    );

                _investmentRepository.Add(investment);



                await _investmentRepository.UnitOfWork
                .SaveChangesAsync();
            }
            catch (Exception ex)
            {
                Console.WriteLine("Handle Command: CreateInvestmentCommand.");
                Console.WriteLine("Result: Failure.");
                Console.WriteLine("Error Message: " + ex.Message);

                return(false);
            }


            return(true);
        }