WSL secure storage keyring issue

Description

Reported by @ar4152 (https://github.com/ar4152). See PR #281.

"I have added in-memory auth storage support for solid logins, as a workaround for the secure storage issue on WSL."

Windows Subsystem for Linux

Why

The following issue occurs only on WSL because something to do with the headless component part of WSL. As a result solid logins don't work on WSL.

** (com.example.mlflutter:52445): WARNING **: 23:08:22.064: libsecret_error: Failed to unlock the keyring
Solid Authenticate Failed: PlatformException(Libsecret error, Failed to unlock the keyring, null, null)

Alternatives

Is there some way to get the keyring working on WSL?

Additional Context

"Considered other alternatives for auth storage such as: file, shared_preferences and in-memory. I figured people would be using WSL only for testing or development so went with the in-memory option since no info would stored on disk. File based and shared_preferences would be saving info unencrypted on disk, so perhaps not the best idea. Only downside is users have login each time on WSL - if you would like to switch to file-based or shared_preferences method, please let me know."

WSL may well become a deployment platform given it is the most widely used Linux platform today. So if we can resolve this in general rather than the in-memory work around then it would be better.