未登录 接口报错，应返回未登录提示

src/main/java/com/fdkankan/scene/service/impl/SceneServiceImpl.java

@@ -117,6 +117,10 @@ public class SceneServiceImpl extends ServiceImpl<ISceneMapper, Scene> implement
     @Override
     public ResultData isLogin(String num, SSOUser ssoUser) throws Exception {
 
+        if(Objects.isNull(ssoUser)){
+            throw new BusinessException(ErrorCode.FAILURE_CODE_3004);
+        }
+
         // 解密获得username，用于和数据库进行对比
         String username = ssoUser.getUserName();