Retrieve new-invoice-message template
documentedRetrieve default subject/body for a new invoice message.
GET /v2/invoices/{INVOICE_ID}/messages/newInvoicesno implementation yet0 runsInput
invoice_id
Invoice ID
13150403
account_id
Harvest Account ID
Your Harvest account ID
Calls Harvest as you (your API key is your account); keychains.dev holds the credentials.