Can I inject a service into a filter in Grails?

I have a service to get and set the user in the session. I would like to pass in some user information to each view if there is a logged in user and thought a filter would be the best way so I don't have to duplicate that in every controller/action. When I run the app, it get this error:

Error creating bean with name 'userService': Scope 'session' is not active for the current thread

My filter looks like this:

class SecurityFilters {
    def userService

    def filters = {
        setUser(controller:'*', action:'*') {
            before = {
                if (userService.isLoggedIn()) {
                    request.user = userService.getUser()
                } else {
                    request.user = null
                }
            }
        }
    }   
}

I know I can just ultimately access the user through session.user, but I want to be able to call userService.isLoggedIn() which I can't easily through the view. So is there a way to inject the service into the filter, or should I just create a taglib to wrap userService.isLoggedIn()?