Adds labels to a contact.
Use the Labels API to create or retrieve labels.
Members are typically linked to contacts, and while they share a relationship, the member ID and contact ID are distinct identifiers. Make sure to specify the contact ID when calling Label Contact.
You can only call this method when authenticated as a Wix app or Wix user identity.
ID of the contact to add labels to.
List of label keys to add to the contact.
Label keys must exist to be added to the contact. Use the Labels API to create or retrieve labels.