[keycloak-user] Multi realms approach

Hi, I'm currently working on a project with specific requirements. Actually what we are trying to do is to setup a Keycloak in order to protect several applications. Each of these applications will potentially have their own set of webapps and micro-services. What we intended to do is to declare a realm per app (and each component of the app would be a client within it's own realm). We need to setup some cross-realm features such as realm selection, multi-realm authentication (i.e not being forced to re-login when switchin from one realm to another). I'm looking for advices or feedbacks in implementing such a case. Would you have any ? Yours,