Exhibitor Update - Children

To create exhibitor children associated with an existing exhibitor, employ the /api/v2/exhibitor/set endpoint. To link child entries to an exhibitor, use EP's matching method to identify the exhibitor and then use the specified fields.

1. event_id: The unique identifier for the event (integer)

2. exhibitor_id: Exhibitor´s ID (integer)

3. children_exhibitors: Children exhibitor IDs separated by comma, will be saved only if is_parent_exhibitor is true