stripe-react-serverless-33.ts

class StripeManager {
  ...

  public static async retrieveSubscription(subscriptionID: string) {
    const request = await fetch('https://your-endpoint/stripe/retrieve-subscription', {
      method: 'POST',
      body: JSON.stringify({
        subscriptionID,
      }),
    });

    return await request.json() as IStripeSubscription;
  }

  ...
}