Passing custom variable(s) to Steam

[THE-SIMPLE-MARK]

There needs to be a way to pass a custom variable of the user's choice to the Steam API which it would pass back because there is currently no way to verify if the id came from a specific user for example.

[LeeviHalme]

Yes, that would be helpful. Added the enchantment tag to this issue and will fix it in my free time. While waiting, PRs are welcome :)

[joshuajeschek]

Hi, I've been just passing that in the redirect url ik, it could be faked that way by the user, but I've just been using expiring uuids, so i think it's fine.