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Steam Sign In 1.2.3

Allows users to sign in with their Steam accounts. Requires ‘OpenID’ plugin to be enabled first.

Support for logging in with a Steam account using OpenID.

Please note that this plugin requires OpenID 0.2 because of a bug in the current version. If you're running the stable vanilla branch, you will have to update your OpenID plugin, or update to the 2.1 beta of vanilla forums. You can do this by downloading the Zip from the Vanilla Forums GitHub and uploading the OpenID plugin from there.