The centralized login is part of Sandstorm for Work, which is also open source: "The code for Sandstorm for Work is maintained in the Sandstorm open source pro

The centralized login is part of Sandstorm for Work, which is also open source: "The code for Sandstorm for Work is maintained in the Sandstorm open source project, under the Apache License 2.0. Feel free to read the code in GitHub." [0] And: "Is it Open Source? Yes! Sandstorm for Work features are part of the same codebase as the rest of Sandstorm and under the same Apache 2.0 license. However, in order to unlock Sandstorm for Work features, we ask that you buy a “feature key” from us. So how does that work? Can’t anyone just remove the feature key check? In fact, yes, you can. However, if you did that, you would not be able to take advantage of our automatic updater, which ensures that your server is updated to the latest version within 24 hours of any release with no effort on your part. Automatic updates are important to keep your server secure and to make sure you can always run the latest apps." [1] P.S. Just a happy Sandstorm user here. 0: https://docs.sandstorm.io/en/latest/administering/for-work/#open-source https://docs.sandstorm.io/en/latest/administering/for-work/#... 1: https://sandstorm.io/news/2016-04-06-sandstorm-for-work https://sandstorm.io/news/2016-04-06-sandstorm-for-work