The primary account key that is associated with BlackBerry Hub data.
#include "bb/pim/unified/unified_data_source.h"
typedef long long int uds_account_key_t;
BlackBerry 10.2.0
This key is unique across the platform, and it identifies a particular user account on a device (such as a messaging account). You can obtain this key by using the PIM Accounts API, which includes classes such as AccountService, AccountKey, and so on.