Creates an export and its destination atomically. The organization is taken from the API key; the project_id in the body must belong to it, as must the destination's integration_id. The export name must be unique within the project. For a weekly schedule, run_day_of_week is required.

Include additional_destinations to deliver to more than one destination from the start; each entry is the same destination shape as destination and is written in the same transaction. Only valid alongside destination; an export can have at most 5 destinations total, each on a different connection. Marketplace destinations cannot be combined with others, and a DelivrDSP destination can only be the export's first (primary) destination.