"~/.kube/cache/oidc-login" on Windows is not the user home directory but a literal "~" directory in user home

[LulaSvob]

Describe the issue

Cache on Windows is in a folder called "~" inside the user directory. I.e. C:\Users\<User.Name>\~\.kube

To reproduce

On Widows go to C:\Users\<User.Name>\~\.kube

Your environment

• OS: Windows 10
• kubelogin version: kubelogin version v1.23.1 (go1.16.3 windows_amd64)
• kubectl version: v1.20.4
• OpenID Connect provider: Key Cloak

[trexx]

This seems to be a result of this change where previously a library detected the home directory, now the tilde is hardcoded and breaks on Windows. Whats worse is that it creates the ~ directory in the working directory. So you leave oidc tokens everywhere...beware committing secrets in to git.
https://github.com/int128/kubelogin/pull/489/files
#488

You can override the directory with a parameter in your kube config with token-cache-dir but this isn't helpful when you share configuration between WSL and Windows.
The default was cross platform friendly, and anyone who needed to override it could with token-cache-dir. The newly introduced expansion in that pull request would still work for anyone who overrode token-cache-dir with a literal ~ in their path.

@int128 @Mattias- What do you think about reverting the default to utilising homedir.Dir() for all platforms?

[int128]

Thank you for bringing up this issue. I will fix this soon.