we are working on a Zoho Books integration.

When getting a single invoice via the API under https://www.zohoapis.com/books/v3/invoices/:invoiceId, the response includes custom fields added to the customer under the key "customer_custom_fields".

However, when getting a single credit note under https://www.zohoapis.com/books/v3/creditnotes/:creditnoteId, then the same custom fields added to the customer are not included.

Is there a way to get customer custom fields when getting a credit note via the API?