fix 新增code 空判断

netflix-service/src/main/java/com/cyksj/service/register/impl/RegisterOrderDonServiceImpl.java

@@ -114,7 +114,9 @@ public class RegisterOrderDonServiceImpl extends ServiceImpl<RegisterOrderDonMap
      */
     @Override
     public boolean isFree(long userId, String platform, String code) {
-
+        if (StringUtils.isBlank(code)) {
+            return false;
+        }
         SysConfig sysConfig = sysConfigService.getOne(Wrappers.lambdaQuery(SysConfig.class).eq(SysConfig::getSysKey, "spotify_free_code"));
         if (sysConfig == null) {
             return false;