public static bool IsAccountExists(string accountNumber = "")
        {
            if (accountNumber != "")
            {
                var allAccountNumber = AlexaService.GetAllAccountNumber();

                foreach (var acc in allAccountNumber)
                {
                    if (acc.Equals(accountNumber))
                    {
                        return(true);
                    }
                }
            }
            else
            {
                return(false);
            }

            return(false);
        }