HugeGraphServer开启权限认证，admin没问题，hugegraph创建PK失败

### Expected behavior 期望表现
可以使用admin或者跟图名字一样的username及其token访问该图的schema和graphs接口

### Actual behavior 实际表现
- 当使用admin时，可以访问所有接口
- 当使用跟图的名字一样的username时，报错”permission denied“

### Steps to reproduce the problem 复现步骤

按照[官网](https://hugegraph.github.io/hugegraph-doc/config/config-authentication.html)配置权限，当使用跟图名字一样的username时，报错”permission denied“。

下图是使用loader导入时的报错，loader设置了--token为图的名字对应的token


> 注：使用RESTful API创建PropertyKey也是一样的错误

Start with the linked authentication configuration and reproduce the failure using the loader's --token option and the RESTful API PropertyKey creation request. Compare access as admin with access as the graph-named user. Done means that user can access the graph's schema and graphs interfaces and create a PropertyKey without a permission-denied error.

Written by the indexing model from the issue text.