[keycloak-user] Keycloak WildFly Swarm Server

Hi all, I would like to use Keycloak as a microservice SSO solution on OpenShift. The Red Hat SSO uses way to much CPU and RAM, therefore, I would like to use the WildFly Swarm Server instead. Is there any way to set an admin user during the first initialization? Otherwise, I am going to import a realm with a pre defined user. Thanks, Michael