安装
clone下来之后，子模块需要执行以下命令才能拿到
git.exe submodule update --progress --init -- "IdentityServer4.XCode"
官方资源
https://github.com/IdentityServer/IdentityServer4
https://github.com/IdentityServer/IdentityServer4.Samples
https://github.com/IdentityServer/IdentityServer4.Quickstart.UI