🔧 (billing) New checkout session should work with existi…

ee/packages/billing/api/createCheckoutSession.ts

@@ -74,14 +74,28 @@ export const createCheckoutSession = async ({
     },
   })
 
-  const customer = await stripe.customers.create({
+  const existingCustomer = await stripe.customers.list({
+    email,
+  })
+
+  if (existingCustomer && email !== existingCustomer.data[0].email)
+    throw new TRPCError({
+      code: 'BAD_REQUEST',
+      message: 'Make sure to log in with the same email as the one provided',
+    })
+
+  const customerData = {
     email,
     name: company,
     metadata: { workspaceId },
     tax_id_data: vat
       ? [vat as Stripe.CustomerCreateParams.TaxIdDatum]
       : undefined,
-  })
+  }
+  const customer =
+    existingCustomer.data.length > 0
+      ? await stripe.customers.update(existingCustomer.data[0].id, customerData)
+      : await stripe.customers.create(customerData)
 
   const checkoutUrl = await createCheckoutSessionUrl(stripe)({
     customerId: customer.id,