bug fix + use id instead of username for lookup

pages/api/routes/links/index.ts

@@ -9,7 +9,7 @@ import updateLink from "@/lib/api/controllers/links/updateLink";
 export default async function links(req: NextApiRequest, res: NextApiResponse) {
   const session = await getServerSession(req, res, authOptions);
 
-  if (!session?.user?.username) {
+  if (!session?.user?.id) {
     return res.status(401).json({ response: "You must be logged in." });
   } else if (session?.user?.isSubscriber === false)
     res.status(401).json({