`addListContacts`

Add contacts (by id, ctr_…) to a list. Returns how many were newly added; contacts already on the list are ignored.

HTTP: POST /api/lists/{id}/contacts

Parameters

Field	Type	Required	Description
`contactIds`	array	✓

any

Object res = mk.addListContacts(Map.of("id", "lst_1", "contactIds", ctr_1,ctr_2));