#### What type of PR is this?
/kind improvement
/kind api-change
/area core
/milestone 2.0
#### What this PR does / why we need it:
Please see b092b390b7/docs/authentication/README.md
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/2506
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
优化系统登录和登出逻辑
```
John Niang