Add authenticateView to ResourceServer

[KyleJune]

Depends on #9 & #12

To be able to use oauth2 for views,this cannot use authenticate because it responds to the request with a json error if authenticate fails and it doesn't request authentication when user is not logged in. The resource server need a separate function for authenticating the view so that it can leave the handling of errors to the routing framework and request authentication when user is not logged in.