feat:增加服务器接口模块

lib/models/auth.g.dart

@@ -0,0 +1,14 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'auth.dart';
+
+// **************************************************************************
+// JsonSerializableGenerator
+// **************************************************************************
+
+Auth _$AuthFromJson(Map<String, dynamic> json) =>
+    Auth(userId: (json['userId'] as num).toInt());
+
+Map<String, dynamic> _$AuthToJson(Auth instance) => <String, dynamic>{
+  'userId': instance.userId,
+};