Add NavigationAuth

lib/utils/navigation_auth.dart

@@ -0,0 +1,34 @@
+import 'package:flutter/material.dart';
+
+import 'package:nekoya_flutter/data/auth.dart';
+import 'package:nekoya_flutter/screens/login.dart';
+
+class NavigationAuth extends StatelessWidget {
+  const NavigationAuth({Key? key, required this.route}) : super(key: key);
+
+  final Widget route;
+
+  @override
+  Widget build(BuildContext context) {
+
+    return FutureBuilder<dynamic>(
+      future: checkSessionExist(),
+      builder: (context, snapshot) {
+        if (snapshot.hasData) {
+          var data = snapshot.data;
+          if (data) {
+            return route;
+          } else {
+            return const Login();
+          }
+        } else {
+          return const Center(
+            child: CircularProgressIndicator(
+              color: Color(0xff8B0000),
+            ),
+          );
+        }
+      }
+    );
+  }
+}