[keycloak-user] Access Query Parameter in FreeMarker Template - Keycloak 2.1.0

Hello, I must access Query Parameters passed to my keycloak login theme. Neither was I able to obtain them using RequestParameters.paramName nor request.getParameter(paramName) in the login FreeMarker template. Everytime I access a query parameter using these methods I get an FreeMarker error 2017-07-06 13:32:07,917 ERROR [freemarker.runtime] (default task-12) Error executing FreeMarker template: freemarker.core.InvalidReferenceException: The following has evaluated to null or missing I also found that there is an url object visible which provides a few keys to access. I am using Keycloak 2.1.0 which includes a FreeMarker jar version 2.3.20. Can anybody support me in this issue? I need to use query params to dynamically display information on the login theme. Kind Regards, Bernhard