Removes labels from a contact.
The unlabelContact() function returns a Promise
that resolves when the specified labels are removed from the contact.
If a label is no longer needed
and you want to remove it from all contacts,
you can delete it with
deleteLabel().
Note:
Only visitors with
Manage Contacts permissions
can unlabel contacts.
You can override the permissions by setting the suppressAuth option to true.
ID of the contact to remove labels from.
List of label keys to remove from the contact.
Authorization options.