Returns the next sequence number for various document types - invoices, quotes, credit notes, and others. For example, if the last issued invoice is INV-00042, the next invoice number is 43.
To set the next document numbers, use PATCH /entities/{entity_id}/settings.
For more information, see Document number customization.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Unique ID of the entity