[keycloak-user] How to check permissions on lot of resources

Hello, I'm trying to protect resources with keycloak, but I wonder how to protect millions... I created successfully resources with the Protection API (UMA 2.0), and also created necessary permsions and policies with the Admin REST API. What I would like to do is simply get the list of resources I should be able to access. To simplify my needs, here is a simple example : Bob asks for resource1 and resource2 throught entitlement API Regarding my policies and permissions Bob only have rights on resource 1 but not on resource2. I was thinking making a POST request with the following payload : { "permissions" : [ { "resource_set_name" : "resource1" }, { "resource_set_name" : "resource2" } ] } would return a RPT with the list of permitted resources (resource1), but I got 403 forbidden without the list of granted resources. So, I know I could run two separated requests to get my authorizations, but when I have thousands of resources to check, I can't run thousands http requests on entitlement API. The question is how can I filter the data I retrieved from my database with keycloak in order to get only granted data ? Keycloak is wonderful, and I would really continue to use it despite this trouble that I encounter. Thank you very much by advance for your help.