fixed vite auth callback url login

Author: AnujaKalahara99

Frontend/src/components/login.tsx

@@ -48,7 +48,7 @@ function Login() {
     const { error } = await supabase.auth.signInWithOAuth({
       provider: "google",
       options: {
-        redirectTo: "http://localhost:5173/dashboard",
+        redirectTo: import.meta.env.VITE_AUTH_CALLBACK_URL,
       },
     });