Currently, we are only able to get the invoice UUID, which is basically the internal unique identifiers that DigitalOcean uses.
It would be great for us to be able to get the invoice number associated with each invoice as well.
This is relevant since the finance/accounting department would use this number as the reference number for that particular invoice, instead of the invoice UUID that developers would use.
The invoice number that I am referring to is the number stated in the PDF file version of the invoice. It is also included in the filename of the PDF when it is downloaded from the Billing page of the DigitalOcean dashboard.