How to use the deployfish.terraform.NoSuchStateFile function in deployfish

def _get_state_file_from_s3(self, state_file_url, profile=None, region=None):
        if profile:
            session = boto3.session.Session(profile_name=profile, region_name=region)
        else:
            session = get_boto3_session()
        s3 = session.resource('s3')
        parts = state_file_url[5:].split('/')
        bucket = parts[0]
        filename = "/".join(parts[1:])
        key = s3.Object(bucket, filename)
        try:
            state_file = key.get()["Body"].read().decode('utf-8')
        except ClientError as ex:
            if ex.response['Error']['Code'] == 'NoSuchKey':
                raise NoSuchStateFile("Could not find Terraform state file {}".format(self.state_file_url))
            else:
                raise ex
        return json.loads(state_file)

def wrapper(*args, **kwargs):
        try:
            args[0].obj['CONFIG'] = Config(
                filename=args[0].obj['CONFIG_FILE'],
                env_file=args[0].obj['ENV_FILE'],
                import_env=args[0].obj['IMPORT_ENV'],
                tfe_token=args[0].obj['TFE_TOKEN']
            )
        except NoSuchStateFile as e:
            click.echo(str(e))
            sys.exit(1)
        else:
            return func(*args, **kwargs)
    return wrapper