Update OAuth2-Backend-Approach.md

OAuth2-Backend-Approach.md

@@ -248,70 +248,49 @@ curl -X GET "https://www.googleapis.com/oauth2/v3/userinfo" \
 ### Frontend Code
 
 ```js
-// DashboardPage.jsx
 import { useEffect, useState } from 'react';
 import { useNavigate } from 'react-router-dom';
 
 function DashboardPage() {
   const navigate = useNavigate();
   const [isLoading, setIsLoading] = useState(true);
-  const [error, setError] = useState(null);
   const [dashboardData, setDashboardData] = useState(null);
 
   useEffect(() => {
-    async function initializeDashboard() {
+    async function loadDashboard() {
       try {
         
         // 
-        // First verify auth
+        // Single request that both verifies auth and gets data
         //
-        const authResponse = await fetch('https://myapp/api/verify-auth', {
-          credentials: 'include',
+        const response = await fetch('https://myapp/api/dashboard-data', {
+          credentials: 'include'  // Sends the auth cookie
         });
 
-        if (!authResponse.ok) {
-          throw new Error('Authentication failed');
+        if (!response.ok) {
+          //
+          // If auth is invalid, the backend will return 401
+          //
+          if (response.status === 401) {
+            navigate('/login');
+            return;
+          }
+          throw new Error('Failed to load dashboard');
         }
 
-        //
-        // Auth is valid, now fetch dashboard data
-        //
-        const dataResponse = await fetch('https://myapp/api/dashboard-data', {
-          credentials: 'include',
-        });
-
-        if (!dataResponse.ok) {
-          throw new Error('Failed to load dashboard data');
-        }
-
-        const data = await dataResponse.json();
+        const data = await response.json();
         setDashboardData(data);
         setIsLoading(false);
       } catch (err) {
-        //
-        // Redirect to login on auth failure
-        //
-        setError(err.message);
         navigate('/login');
       }
     }
 
-    initializeDashboard();
+    loadDashboard();
   }, [navigate]);
 
   if (isLoading) {
-    return (
-      <div className="flex items-center justify-center min-h-screen">
-        <div className="text-center">
-          <h2>Loading Dashboard...</h2>
-          <p>Please wait while we verify your session.</p>
-        </div>
-      </div>
-    );
-  }
-
-  if (error) {
-    return null;
+    return <div>Loading...</div>;
   }
 
   return (
@@ -321,3 +300,4 @@ function DashboardPage() {
   );
 }
 ```
+