How to use the oncall.utils.gen_link_id function in oncall

if cursor.fetchone()['num_events'] == len(events):
                return

        if len(events) == 1:
            [event] = events
            event_args = (team_id, schedule_id, event['start'], event['end'], user_id, role_id)
            logger.debug('inserting event: %s', event_args)
            query = '''
                INSERT INTO `%s` (
                    `team_id`, `schedule_id`, `start`, `end`, `user_id`, `role_id`
                ) VALUES (
                    %%s, %%s, %%s, %%s, %%s, %%s
                )''' % table_name
            cursor.execute(query, event_args)
        else:
            link_id = gen_link_id()
            for event in events:
                event_args = (team_id, schedule_id, event['start'], event['end'], user_id, role_id, link_id)
                logger.debug('inserting event: %s', event_args)
                query = '''
                    INSERT INTO `%s` (
                        `team_id`, `schedule_id`, `start`, `end`, `user_id`, `role_id`, `link_id`
                    ) VALUES (
                        %%s, %%s, %%s, %%s, %%s, %%s, %%s
                    )''' % table_name
                cursor.execute(query, event_args)

def create_events(self, team_id, schedule_id, user_id, events, role_id, cursor, skip_match=True, table_name='event'):
        if len(events) == 1:
            [event] = events
            event_args = (team_id, schedule_id, event['start'], event['end'], user_id, role_id)
            logger.debug('inserting event: %s', event_args)
            query = '''
                INSERT INTO `%s` (
                    `team_id`, `schedule_id`, `start`, `end`, `user_id`, `role_id`
                ) VALUES (
                    %%s, %%s, %%s, %%s, %%s, %%s
                )''' % table_name
            cursor.execute(query, event_args)
        else:
            link_id = gen_link_id()
            for event in events:
                event_args = (team_id, schedule_id, event['start'], event['end'], user_id, role_id, link_id)
                logger.debug('inserting event: %s', event_args)
                query = '''
                    INSERT INTO `%s` (
                        `team_id`, `schedule_id`, `start`, `end`, `user_id`, `role_id`, `link_id`
                    ) VALUES (
                        %%s, %%s, %%s, %%s, %%s, %%s, %%s
                    )''' % table_name
                cursor.execute(query, event_args)
        cursor.execute('UPDATE `schedule` SET `last_scheduled_user_id` = %s WHERE `id` = %s', (user_id, schedule_id))