fix

lib/models/image_resp.dart

@@ -0,0 +1,30 @@
+import 'dart:ffi';
+
+import 'package:json_annotation/json_annotation.dart';
+
+part 'image_resp.g.dart';
+
+@JsonSerializable()
+class ImageResp {
+  int id;
+  String file_name;
+  String file_path;
+  int upload_time;
+  int size;
+  int width;
+  int height;
+
+  ImageResp(this.id, this.file_name, this.file_path, this.upload_time,
+      this.size, this.width, this.height);
+
+  /// A necessary factory constructor for creating a new Configs instance
+  /// from a map. Pass the map to the generated `_$ConfigsFromJson()` constructor.
+  /// The constructor is named after the source class, in this case, Configs.
+  factory ImageResp.fromJson(Map<String, dynamic> json) =>
+      _$ImageRespFromJson(json);
+
+  /// `toJson` is the convention for a class to declare support for serialization
+  /// to JSON. The implementation simply calls the private, generated
+  /// helper method `_$ImageRespToJson`.
+  Map<String, dynamic> toJson() => _$ImageRespToJson(this);
+}