[keycloak-user] Replace use of Infinispan with User Sessions SPI ?

Hi, in my current project, it’s not wanted to use Infinispan as cache in a cluster. However, I have to deal with the user session and token information. And as I can remember, in early versions of Keycloak was an option, to store this information via JPA or MongoDB instead of Infinispan. Also, I saw there is a User Sessions SPI, and also a User Cache SPI and Realm Cache SPI. If I implement those SPIs, can I get rid of Infinispan replication in a cluster? And are there some examples or good starting points? (documentation?) Regards, - Niko