更改

lib/retrofit/data/login_info.dart

@@ -6,7 +6,7 @@ class LoginInfo {
       AuthInfo authInfo, 
       List<CouponList> couponList,}){
     _authInfo = authInfo;
-    _couponList = couponList;
+    // _couponList = couponList;
 }
 
   LoginInfo.fromJson(dynamic json) {
@@ -24,8 +24,6 @@ class LoginInfo {
   AuthInfo get authInfo => _authInfo;
   List<CouponList> get couponList => _couponList;
 
-
-
   Map<String, dynamic> toJson() {
     final map = <String, dynamic>{};
     if (_authInfo != null) {