Most of the code is taken from [Authorizer](https://github.com/tejado/Authorizer), specifically the `authorizer/src/main/java/net/tjado/authorizer` folder.
I'm pretty sure I'm respecting the GPLv3 license of the code I copied, but I'm bad at parsing legalese, so if there's any issues, just contact me at [dev@askiiart.net](mailto:dev@askiiart.net).