public IActionResult Post(string customerId, [FromBody] TransactionDTo dto)
        {
            if (dto == null)
            {
                return(BadRequest());
            }
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }
            var result = _transactionProvider.AddTransaction(customerId, dto);

            if (result == null)
            {
                return(StatusCode(500, "A problem occurred while handling your request."));
            }
            return(CreatedAtRoute("GetTransaction", new { id = result.TransactionID }, result));
        }