chore: Bail earlier when an invalid session is found (Fixes calcom#15982) (calcom#27609)

Co-authored-by: Sparky Autonomous <sparky@openclaw.ai>

Author: Sparky-Autonomous

apps/web/pages/api/integrations/[...args].ts

@@ -54,6 +54,11 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
   }
 
   const [appName, apiEndpoint] = args;
+
+  if (apiEndpoint === "add" && !req.session?.user?.id) {
+    return res.status(401).json({ message: "You must be logged in to do this" });
+  }
+
   try {
     /* Absolute path didn't work */
     const handlerMap = (await import("@calcom/app-store/apps.server.generated")).apiHandlers;