async function tellYouLater(sayWhat) {
    // Do something asynchronous, such as DB access, web access, etc.
    const result = await somethingAsync(sayWhat);
    return result;
}

async function tellYouLater(sayWhat) {
    // Do something asynchronous, such as DB access, web access, etc.
    return "I said: "+sayWhat;
}

async function test() {
    return tellYouLater("I'll tell you later") ;
}

test().then(log,$error);

Update to a working example of async and await
Update to a working example of async and await