authentication - Authenticate route in AngularJS -

i have route setup in angularjs looks this:

$routeprovider             .when('/aaa/bbb', {                 templateurl: 'app/aaa/aaa.html',                 controller: 'aaactrl'             }); 

now whenever user visits /aaa/bbb user should able visit if user logged in, otherwise user should redirected /login. after login in user should redirected /aaa/bbb requested.

i know possible connect-ensure-login don't understand how setup routing express? in express routes setup /api routes not routes end-user visisting /aaa/bbb