修复 Cannot read property 'nickname' of undefined 错误问题

jd_unsubscribe.js

@@ -297,7 +297,11 @@ function TotalBean() {
               $.isLogin = false; //cookie过期
               return
             }
-            $.nickName = data['base'].nickname;
+            if (data['retcode'] === 0) {
+              $.nickName = data['base'].nickname;
+            } else {
+              $.nickName = $.UserName
+            }
           } else {
             console.log(`京东服务器返回空数据`)
           }