ContactsContacts, their channel identities, capabilities, timeline, and tags.List contactsGET /contactsCreate contactPOST /contactsGet contactGET /contacts/{contactId}Update contactPATCH /contacts/{contactId}Delete contactDELETE /contacts/{contactId}Get contact capabilitiesGET /contacts/{contactId}/capabilitiesList contact identitiesGET /contacts/{contactId}/identitiesAttach contact identityPOST /contacts/{contactId}/identitiesDetach contact identityDELETE /contacts/{contactId}/identities/{identityId}List contact tagsGET /contacts/{contactId}/tagsAdd contact tagsPOST /contacts/{contactId}/tagsRemove contact tagDELETE /contacts/{contactId}/tags/{tag}Get contact timelineGET /contacts/{contactId}/timeline