ember-simple-auth: How to redirect to login page if get the 401 error?

Hi, I update my ember-simple-auth version 0.7.3 to 0.8.0. The user will get the 401 errors in console, but page can not redirect to login page. The problem like: http://stackoverflow.com/questions/30708081/how-to-redirect-to-login-page-if-get-the-401-error-when-i-use-ember-simple-auth

Any help please.