Dynamically set the schema used within Keycloak UserStorage SPI

[Matthias]

I am implementing a custom user storage provider which gets the user data from an external PostgreSQL database. Since I have several schemas I want to create 2 instances of that provider where I am using the schema name to query the database.

I am about to use this example which is using quarkus and JPA(Hibernate) to encapsulate the database access.

How can I set the schema (within UserEntity?) programmatically to achieve that?
Also there is a persistence.xml in this example can I get rid of this and only use the quarkus.properties file or is it needed (by the underlaying server)?

 Thanks and Best Regards

Matt