title: How do I catch a 401 for a partial that I can't access?
body: <p>In my app I have a token mechanism for authentication.
  Every API call needs the token, otherwise it returns a 401.
  Which I can easily handle with a response interceptor.</p>
  
  <p>Now when I am using regular routes, and say the token expire, and I try to visit a partial that requires authentication, How will I trap 401 that I get while routing ?</p>
  
  <p>In cases where the first thing that the page comes is making an API call, I will come to know of token expiry and will logout the user.</p>
  
  <p>I want to be able to stop the user from visiting a view if the token has expired. 
  Will response interceptors take care of this scenario also ?</p>