http://ro4h37fieb6oyfrwoi5u5wpvaalnegsxzxnwzwzw43anxqmv6hjcsfyd.onion/dwango/sangrok/apache-tomcat-9.0.85-windows-x64/apache-tomcat-9.0.85/webapps/docs/realm-howto.html
Quick Start To set up Tomcat to use DataSourceRealm, you will need to follow these steps: If you have not yet done so, create tables and columns in your database
that conform to the requirements described above. Configure a database username and password for use by Tomcat, that has
at least read only access to the tables described above.