Stripe Connect and Firebase Functions

Question

I'm trying to set up stripe connect with firebase functions. So far I have a connected account created when a new item gets added to the firestore DB with the following code.

 exports.createConnectedAccount = functions.firestore
  .document("dbitem/{dbitemId}")
  .onCreate(async (snap, context) => {
    const account = await stripeClient.accounts.create({ type: "express" });

    return admin
      .firestore()
      .collection("connected_accounts")
      .doc(snap.id)
      .set({ account_id: account.id });
  });

Now the part i'm not understanding from the documentation is the following:

 const accountLink = await stripe.accountLinks.create({
  account: 'acct_1032D82eZvKYlo2C',
  refresh_url: 'https://example.com/reauth',
  return_url: 'https://example.com/return',
  type: 'account_onboarding',
});

how do I create the account links, and how to make the https request through firebase functions for the refresh and return urls.