re factor rog

lib/features/state/user_state.dart

@@ -0,0 +1,18 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:rogapp/features/data/user.dart';
+
+class UserNotifier extends StateNotifier<User?> {
+  UserNotifier() : super(null);
+
+  void setUser(User? user) {
+    state = user;
+  }
+
+  void clearUser() {
+    state = null;
+  }
+}
+
+final userNotifierProvider = StateNotifierProvider<UserNotifier, User?>((ref) {
+  return UserNotifier();
+});