[Request]: Support for multiple steam users

[VidarHook]

Tell us the problem or your need

Looking at the __get_local_config_path function, it simply globs over the list of users in Steam/userdata/ and picks the first one. This leads to it not discovering steam games unless launched by the user it picks.

Describe the solution you'd like

Maybe merge the vdf dicts from both users somehow, or at least the appids.

Other solutions?

Maybe figure out what user is logged in if several are present and use that one.

Additional context and references

With two accounts, manually editing the flatpak code in steam.py to return confs[-1] makes it list all my steam games again, so this was indeed my issue.