14.23Polling helper

Conceptually:

async function waitForAccount(
  customerId: string,
  timeoutMs = 30000
) {
  const start = Date.now();

  while (Date.now() - start < timeoutMs) {
    const account =
      await findAccount(customerId);

    if (account) return account;

    await new Promise(r => setTimeout(r, 1000));
  }

  throw new Error(
    `Account ${customerId} did not appear`
  );
}

Then:

const account =
  await waitForAccount(customer.customerId);