android - implementing push notification in ionic app -

i trying implement push notification in ionic app android. have followed step step guide http://docs.ionic.io/v1.0/docs/push-from-scratch. when running app on android phone, registered users listed in apps.ionic.io. user registration working fine. device registration not working. giving error cannot read property 'pushnotification' of undefined

this code @ top of app.js

angular.module('starter', ['ionic','ngcordova',     'ionic.service.core',     'ionic.service.push',     'starter.controllers',     'starter.services'])      .config(['$ionicappprovider', function($ionicappprovider) {         // identify app         $ionicappprovider.identify({             // app id (from apps.ionic.io) server             app_id: '',             // public api key services use app             api_key: '',             // set app use development pushes            // dev_push: true             gcm_id: ''         });     }]) 

here code in of controller

 .controller('dashboardctrl', function($scope,$localstorage, wildfireservice, commonutilityservice,pushnotificationservice,$ionicpopup, $ionicloading) {             pushnotificationservice.identifyuser();       pushnotificationservice.pushregister();      }) 

here services.js

 .service('pushnotificationservice', function($q, $ionicuser, $ionicpush) {         var pushnotificationservice = this;         pushnotificationservice.identifyuser  = function(){             var user = $ionicuser.get();             if(!user.user_id) {                 // set user_id here, or generate random one.                 user.user_id = $ionicuser.generateguid();             };              // add metadata user object.             angular.extend(user, {                 name: 'technews',                 bio: 'hardcoded now'             });              // identify user ionic user service             $ionicuser.identify(user).then(function(){                 //alert('identified user ' + user.name + '\n id ' + user.user_id);                 return true;             });         },          pushnotificationservice.pushregister = function(){             // register ionic push service.  parameters optional.             $ionicpush.register({                 canshowalert: true, //can pushes show alert on screen?                 cansetbadge: true, //can pushes update app icon badges?                 canplaysound: true, //can notifications play sound?                 canrunactionsonwake: true, //can run actions outside app,                 onnotification: function(notification) {                     // handle new push notifications here                     // console.log(notification);                     alert(notification);                     return true;                 }             });         }     }) 

can 1 tell me error or missing?

i have added these in index.html

<script src="lib/ionic/js/ionic.bundle.js"></script>     <script src="lib/ngcordova/dist/ng-cordova.js"></script>     <script src="lib/ionic-service-core/ionic-core.js"></script>     <script src="lib/ionic-service-push/ionic-push.js"></script> 

finally push notification working me. moved function call of pushregister controller identifyuser function. here new working code me. controller code

.controller('dashboardctrl', function($scope,$localstorage, wildfireservice, commonutilityservice,pushnotificationservice,$ionicpopup, $ionicloading) {             pushnotificationservice.identifyuser();       }) 

here new services.js

 .service('pushnotificationservice', function($q, $ionicuser, $ionicpush) {             var pushnotificationservice = this;             pushnotificationservice.identifyuser  = function(){                 var user = $ionicuser.get();                 if(!user.user_id) {                     // set user_id here, or generate random one.                     user.user_id = $ionicuser.generateguid();                 };                  // add metadata user object.                 angular.extend(user, {                     name: 'technews',                     bio: 'hardcoded now'                 });                  // identify user ionic user service                 $ionicuser.identify(user).then(function(){                     //alert('identified user ' + user.name + '\n id ' + user.user_id); pushnotificationservice.pushregister();                     return true;                 });             },              pushnotificationservice.pushregister = function(){                 // register ionic push service.  parameters optional.                 $ionicpush.register({                     canshowalert: true, //can pushes show alert on screen?                     cansetbadge: true, //can pushes update app icon badges?                     canplaysound: true, //can notifications play sound?                     canrunactionsonwake: true, //can run actions outside app,                     onnotification: function(notification) {                         // handle new push notifications here                         // console.log(notification);                         alert(notification);                         return true;                     }                 });             }         })