step 9 : listing history scan dan pull to refresh, perbaikan auth model add host

lib/model/auth_model.dart

@@ -1,14 +1,17 @@
 class AuthModel {
   final String token;
+  final String host;
   final UserModel model;
 
   AuthModel({
+    required this.host,
     required this.token,
     required this.model,
   });
 
   Map<String, dynamic> toJson() {
     return {
+      'host':host,
       'token': token,
       'model': model.toJson(),
     };