Basic authentication is done.(need refactor)

src/services/user.js

@@ -0,0 +1,15 @@
+angular.module('codexen.services')
+  .factory('User', function ($http, apiUrl, $rootScope, $state) {
+    $rootScope.$on('userSignOut', function(){
+      $state.go('auth.signin')
+    })
+
+    var me = function () {
+      var url = apiUrl + 'auth/user'
+      return $http.get(url)
+    }
+
+    return {
+      me: me
+    }
+  })