how to apply security token service in a controller

TokenUsingController.groovy

private def accessAllowed = { securityToken, uuid ->
    //check if user is authenticated
    if(!springSecurityService.isLoggedIn()){
        //alternatively check if a security token is provided
        if(!securityToken || securityToken != uuid){
            return(false)
        }

    }
    return(true)
}

def someAction = {
    def someObject = SomeObject.get(params.id)

    if(accessAllowed(params.securityToken, someObject.uuid)){
      //do stuff
    }
    else{
        render status: 403
    }
}