for a typescript project, if you execute resources by calling a an async function() within index.ts - how are resources exported to be used for stack reference? for example: index.ts

const main = async (): Promise<void> => {
    const coreVpc = vpc.createVpc(...);
}

main();

should I just return the coreVpc var within the async function? does pulumi resolve the output in this case?

const main = async (): Promise<{ coreVpc: Vpc }> => {
    const coreVpc = vpc.createVpc(...);

    return { coreVpc };
}

main();