[keycloak-dev] Help with keycloak evaluation

Hi, I'm evaluating the keycloak to use in a multi-module system in production and I need some help in the following topics: - Is it possible to define groups of roles? For example, in a scenario using groups as profiles and the roles as resources. - Single login validation (only allow a single login session per user to avoid account sharing) - Is there any sample federation provider for RDBMS? - Are you planning to develop an adapter to PHP web applications? Any community adapter available? Great Job! Thank you!