I want to create an invoice via Basware test API v1, here is the link -> https://network-developer.basware.com/api-v1.html
I'm using this endpoint 'https://test-api.basware.com/v1/invoices/{bumId}', and do POST request, but I'm getting an '401 Unauthorized' error, but if I will change the endpoint to 'https://test-api.basware.com/v1/account', and do GET request, it will work.
Does anyone have experience with the Basware test API to create an invoice.