cordovaOauth is not working when i use on device


Hi guys im following tutorial oauth-ionic-ngcordova

i follow the guide and also i have checked the issues on the example ng-cordova-oauth/issues/17 i have no idea what im doing wrong i install exactly as the tutorial mention i also change the array scope just like in the issues but when i compile run on device its not execute the $cordovaOauth… any help will be appreciate or some new example of how this things work