Why is the 'file.url' Undefined When Trying to Use the Newly Released File Store in Pi?

Hi , in the doc here, I see that you will need to use the code like this:

export default defineComponent({
  async run({ steps, $ }) {
    // Upload a file to the File Store by a URL
    const file = await $.files.open('pipedream.png').fromUrl('https://res.cloudinary.com/pipedreamin/image/upload/t_logo48x48/v1597038956/docs/HzP2Yhq8_400x400_1_sqhs70.jpg')

    // display the uploaded file's URL from the File Store:
    console.log(await file.toURL())
  },
})

Would you mind checking your code again?