Missing exchangerate in Customer Creditnote?

[Eirik Morken - Proplan AS]

I was hoping that I would not need to create an idea for this as it is obviously an overlooked field in the API when it was implemented. 

The ability to set an exchangerate works perfectly fine in POST /controller/api/v2/customerinvoice and
 /controller/api/v2/customerDebitNote, but is missing in /controller/api/v2/customerCreditNote.

These are sibling endpoints doing the same operation in the same window, and should show the same information.

Reference case: https://community.visma.com/t5/Forum-in-Developers-Visma-net/Missing-exchangerate-in-Customer-Credit...