Removes labels from a contact.
If a label is no longer needed and you want to remove it from all contacts, you can delete by calling Delete Label from the Labels API.
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 Unlabel Contact.
You can only call this method when authenticated as a Wix app or Wix user identity.
ID of the contact to remove labels from.
List of label keys to remove from the contact.