Revert "fix problem on simultaneous login"

This reverts commit 23ba727b9a.

backend/vercel.json

@@ -9,7 +9,7 @@
   "rewrites": [
     {
       "source": "/frontend/:match*",
-      "destination": "https://gse-frontend-preview.vercel.app/:match*"
+      "destination": "https://gse-frontend.vercel.app/:match*"
     }
   ]
 }

frontend/frontend/src/constants.js

@@ -1,9 +1,9 @@
 /* eslint-disable no-nested-ternary */
-export const PROD = false;
+export const PROD = true;
 
 export const USE_LOGGER = true;
 
-export const CLIENT_ID = 'Ov23lilAc5biyyRY0K1u';
+export const CLIENT_ID = 'Ov23liZSweT9LJrck9i8';
 
 export const HOST = PROD
   ? 'github-stats-extended.vercel.app'