@Override
    public List<String> getDataPermission(final String userId) {
        return getUserDataPermissionList(userId).stream().map(DataPermissionDO::getDataId).collect(Collectors.toList());
    }
get data permission by user id.

@param userId user id
@return List
shenyu-admin/src/main/java/org/apache/shenyu/admin/service/impl/DataPermissionServiceImpl.java