Get the number of names that exist and are not expired
        Return {'status': True, 'count': count} on success
        Return {'error': ...} on error

def rpc_get_num_names( self, **con_info ):
        """
        Get the number of names that exist and are not expired
        Return {'status': True, 'count': count} on success
        Return {'error': ...} on error
        """
        db = get_db_state(self.working_dir)
        num_names = db.get_num_names()
        db.close()

        return self.success_response( {'count': num_names} )