first commit

siro_admin/lib/controller/functions/secure_storage.dart

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+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+
+class SecureStorage {
+  final FlutterSecureStorage _storage = const FlutterSecureStorage();
+
+  void saveData(String key, value) async {
+    await _storage.write(key: key, value: value);
+  }
+
+  Future<String?> readData(String boxName) async {
+    final String? value = await _storage.read(key: boxName);
+    return value;
+  }
+}