add structure

lib/vo/status.dart

@@ -0,0 +1,13 @@
+
+class Status {
+  String status;
+  String message;
+  String errorCode;
+  Status(this.status, this.message);
+
+  Status.fromJson(Map<String, dynamic> json) {
+    status = json['status'];
+    message = json['message'];
+    errorCode = json['error_code'];
+  }
+}