public void EmptySavingAccount(int client_id)
{
List <int> idSavingAccount = ConnectionDB.GetSavingAccountIds(client_id);
string queryStringGetCurrentAccountId = $"SELECT id FROM CurrentAccounts WHERE client_id = {client_id}";
int currentAccountId = ConnectionDB.ReturnID(queryStringGetCurrentAccountId);
foreach (int id in idSavingAccount)
{
string queryString = $"SELECT amount FROM SavingAccounts WHERE id = {id};";
double amount = (double)ConnectionDB.ReturnDecimal(queryString);
InstantTransfer instant = new InstantTransfer();
instant.RecordTransferFromSavingToCurrent(id, currentAccountId, amount);
}
}