I am using Zoho Creator to create invoices in Zoho Invoices.  Zoho Invoices auto-generates the invoice numbers.  What code can I use to find the invoice number of the newly-generated invoice ? 

THE CODING I'VE TRIED:

The following line creates the invoices successfully:

response = zoho.invoice.create("Invoices", "633994822", values);

I would have expected "inv" in the following line to give me the invoice number, but it results in a null value:

inv = response.get("invoice_number");