def current_user_or_trial_user
    return current_user if current_user
    debugger
    name = session[:session_id]
    user = User.find_by_username(name)
    user ||= User.new(:username => (name.to_str+DateTime.now.strftime("%Y%M%d%H%M%S")),
                      :password => name,
                      :email => "change#{DateTime.now.strftime('%Y%M%d%H%M%S')}@this.com")

    user.role = "guest"
    user.save
    user
  end