Display / set / update the ECS access key id.

def access_key_id(ecs_access_key_id):
    """Display / set / update the ECS access key id."""
    if not ecs_access_key_id:
        click.secho(dtool_config.utils.get_ecs_access_key_id(CONFIG_PATH))
    else:
        click.secho(dtool_config.utils.set_ecs_access_key_id(
            CONFIG_PATH,
            ecs_access_key_id
        ))