[ISSUE #11957] AuthModule add admin exist

[godhth]

Please do not create a Pull Request without creating an issue first.

What is the purpose of the change

#11957

Brief changelog

XX

Verifying this change

XXXX

Follow this checklist to help us incorporate your contribution quickly and easily:

• Make sure there is a Github issue filed for the change (usually before you start working on it). Trivial changes like typos do not require a Github issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Format the pull request title like [ISSUE #123] Fix UnknownException when host config not exist. Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add integration-test in test module.
• Run mvn -B clean package apache-rat:check findbugs:findbugs -Dmaven.test.skip=true to make sure basic checks pass. Run mvn clean install -DskipITs to make sure unit-test pass. Run mvn clean test-compile failsafe:integration-test to make sure integration-test pass.

[KomachiSion]

There is some conflict with test file.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 51.85185% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 68.74%. Comparing base (6bee5c4) to head (efd14e2).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #12066      +/-   ##
=============================================
- Coverage      68.77%   68.74%   -0.03%     
- Complexity      9127     9132       +5     
=============================================
  Files           1252     1252              
  Lines          40886    40907      +21     
  Branches        4340     4340              
=============================================
+ Hits           28119    28123       +4     
- Misses         10757    10773      +16     
- Partials        2010     2011       +1     

Files	Coverage Δ
...m/alibaba/nacos/sys/module/ModuleStateBuilder.java	100.00% <100.00%> (ø)
...nacos/plugin/auth/impl/NacosAuthPluginService.java	0.00% <0.00%> (ø)
...acos/plugin/auth/spi/server/AuthPluginService.java	0.00% <0.00%> (ø)
...baba/nacos/auth/config/AuthModuleStateBuilder.java	88.88% <75.00%> (-11.12%)	⬇️
...os/plugin/auth/impl/controller/UserController.java	10.22% <0.00%> (+0.44%)	⬆️
...om/alibaba/nacos/sys/module/ModuleStateHolder.java	79.06% <50.00%> (-14.04%)	⬇️

... and 2 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6bee5c4...efd14e2. Read the comment docs.