Hi Josh, yes, it's possible to create your own JPA authentication provider, which will use hibernate model of your own application and authenticate users based on your user data. I hope I understand correctly that this is something you are trying achieve? For declare own datasource, it's easiest to add datasource into file JBOSS_HOME/standalone/configuration/standalone.xml (look at JBoss/Wildfly documentation and/or existing datasource declarations how to do it) and then either create new file META-INF/persistence.xml inside your JAR and/or extend existing keycloak file JBOSS_HOME/standalone/deployments/auth-server.war/WEB-INF/classes/META-INF/persistence.xml and declare your own persistence unit, which will point to the datasource declared in standalone.xml . Again look at docs or existing persistence units for inspiration. Finally in code of your provider, you can do something like: EntityManagerFactory emf =Persistence.createEntityManagerFactory("name-of-your-persistence-unit"); You can take a look at existing Keycloak sources for inspiration. Marek On 30.5.2014 22:39, Josh wrote: