title: Google Oauth - Where to sign in users, backend/frontend
body: <p>What is the difference between using Google OAuth and signing in users at the frontend of the application, and signing in users at the backend side of the application? </p>
  
  <p>Example: Signing in users and getting the ID and a auth object in React or letting Node/Express handle everything, the prosess, redirecting and store it in a database.</p>
  
  <p>Is there any advantages for one or the other methods, which are most common and are there any "rules"?</p>