How to use the flintrock.ec2.NoDefaultVPC function in Flintrock

def get_default_vpc(region: str) -> 'boto3.resources.factory.ec2.Vpc':
    """
    Get the user's default VPC in the provided region.
    """
    ec2 = boto3.resource(service_name='ec2', region_name=region)

    default_vpc = list(
        ec2.vpcs.filter(
            Filters=[{'Name': 'isDefault', 'Values': ['true']}]))

    if default_vpc:
        return default_vpc[0]
    else:
        raise NoDefaultVPC(region=region)