How to obtain the username and password after deploying RadonDB MySQL on KubeSphere?

参照 “在 KubeSphere（3.2.0） 中部署 RadonDB MySQL”文档（https://kubesphere.io/zh/docs/application-store/built-in-apps/radondb-mysql-app/）中，能否加上访问的用户和密码？以及集群外访问的设置方法？部署完跟文档描述不太一样，容器组里有三项，点击哪个进入文档中描述的终端？

KubeSphere版本：3.2.0

环境：单机kubernetes集群。

Start with the linked KubeSphere 3.2.0 RadonDB MySQL deployment page and compare its steps with the reported single-node Kubernetes deployment. Verify where the username and password are exposed, how cluster-external access is configured, and which pod provides the documented terminal. Done means the page explains these steps and matches the deployed resources.

Written by the indexing model from the issue text.