Saldo inicial en Fortnox

What table can I use to retrieve the opening balance of a general ledger account?

I have tried

select *
from   AccountOpeningQuantitiesByAccountNumber(6200) aoy

but this table returns no row, whatever account number I put in the query.

Would you rather use Fortnox.Accounts.AccountByNumber ?

See also:

In release 24.0.728 and newer, the view AccountActiveBalances will be available.

Performance improvements are being studied.