Added necessary dependencies for google sing in, created the google_sign_in provider, modified Info.plist to work with google sign in

lib/src/App.dart

@@ -100,4 +100,4 @@ class App extends StatelessWidget {
       ),
     );
   }
-}
+} */

lib/src/resources/google_login_provider.dart

@@ -0,0 +1 @@
+import 'package:firebase_auth/firebase_auth.dart';