Replaces all contact channels of the specified customer with the list provided in data. Any existing channel that is not in data is deleted.

Each item in data is matched to an existing channel by id, or by type and value when id is omitted. Matched channels are updated and unmatched items are created.

Each id and each type/value pair may appear only once, and at most one item per type can have is_default set to true. The type of the current default channel cannot be changed.

🔒 Requires: customers:write scope