Replaced null coalescence. Updated dates components.

client/src/App/App.js

@@ -30,6 +30,7 @@ export default () => {
   useEffect(() => {
     //Run the auth code only on the first render.
     const unsubscribeFromAuth = auth.onAuthStateChanged(async user => {
+      console.log("Auth State Changed.")
       if (user) {
         let token;
         token = await user.getIdToken();