4. ubah login_screen jadi hook consumer widget

lib/provider/google_login_provider.dart

@@ -0,0 +1,13 @@
+import 'package:google_sign_in/google_sign_in.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+final googleSignInProvider = StateProvider<GoogleSignIn>((ref) {
+  return GoogleSignIn(
+    scopes: [
+      'email',
+      'https://www.googleapis.com/auth/contacts.readonly',
+    ],
+  );
+});
+
+final currentUserProvider = StateProvider<GoogleSignInAccount?>((ref) => null);