working login

lib/controllers/client_state_controller.dart

@@ -0,0 +1,15 @@
+import "package:flutter_riverpod/flutter_riverpod.dart";
+import "package:nexus/models/client_state.dart";
+
+class ClientStateController extends Notifier<ClientState?> {
+  @override
+  Null build() => null;
+
+  void set(ClientState newState) {
+    state = newState;
+  }
+
+  static final provider = NotifierProvider<ClientStateController, ClientState?>(
+    ClientStateController.new,
+  );
+}