[keycloak-user] basic-auth

Hello, As we need to support some legacy applications we are enabling basic auth in the wildfly adapater of our REST oidc clients. What I have noticed is that for every REST call, a 'session' is created on the keycloak server. Is there a way to not create this session? We do have perf tests that will call those REST apis a lot and I am concerned that we will use memory for nothing. Another concern is that during those perf tests we noticed that the keycloak server was using a lot of CPU. A large part of it was used checking the password (the same user was used for all those calls). For legacy reason we cannot ask the caller to first get a token and use it for subsequent calls. So I am wondering if there is a way to configure some 'authentication cache'. (I guess that I am asking for something like the JBossCachedAuthenticationManager for those who know JBoss EAP/Wildfly). In fact I would not even care about the token too and just an OK/NOK from the keycloak server would be needed. This is probably too much to ask and I could do all this from my end. But then to support new clients that are OAuth aware I would need to replicate what the adapter is doing.