Function createPortalSessionForCustomer

createPortalSessionForCustomer(
    cfg: StripeConfig,
    customerId: string,
    returnUrl: string,
): Promise<string>
Open the Stripe billing portal (manage/cancel) for an existing customer. Returns the URL; throws on a Stripe error.
Parameters
- cfg: StripeConfig
- customerId: string
- returnUrl: string
Returns Promise<string>
- Defined in packages/billing/src/payments.ts:93