Fixes error when user cancels stripe integration (calcom#813)

* Fixes customer portal return ur

* Attempt to fix portal CSRF issue

* Fixes CSRF issue with Stripe redirect

* Fixes error when user cancels stripe integration

ee/pages/api/integrations/stripepayment/callback.ts

@@ -1,13 +1,14 @@
 import { Prisma } from "@prisma/client";
 import type { NextApiRequest, NextApiResponse } from "next";
+import { stringify } from "querystring";
 
 import stripe, { StripeData } from "@ee/lib/stripe/server";
 
 import { getSession } from "@lib/auth";
 import prisma from "@lib/prisma";
 
 export default async function handler(req: NextApiRequest, res: NextApiResponse) {
-  const { code } = req.query;
+  const { code, error, error_description } = req.query;
   // Check that user is authenticated
   const session = await getSession({ req: req });
 
@@ -16,6 +17,12 @@ export default async function handler(req: NextApiRequest, res: NextApiResponse)
     return;
   }
 
+  if (error) {
+    const query = stringify({ error, error_description });
+    res.redirect("/integrations?" + query);
+    return;
+  }
+
   const response = await stripe.oauth.token({
     grant_type: "authorization_code",
     code: code.toString(),