LoginView.OnEnter

  $scope.$on('$ionicView.enter', function(){
    vm.errorMessage = $stateParams.errorMessage;

    //if persisted User object exist then go to home page, means user has logged in before
    if(PersistDataService.getObject(user) != undefined){
      $state.go('home')
    }

    vm.doLogin = function(e) {


      //Check if mobile number exist on the database, this returns SECURITY Question, TOKEN and Password(ignored not used)
      AirtimeService
        .validate(vm.phone)
        .then(function(response){
          if(response != "ERROR"){
            //means response contains set of pipe delimited string --> security|code(TOKEN)|password
            //use the security which is the Security Question to present a from to do extra authentication
            //vm.token = get TOKEN from the string

            //Present a security Question and answer view to authenticate the user and use the getSecurityQuestion in UserService to see if the
            //answer provided is correct
            AuthService
              .doLoginWithQuestion
              .then(function(response){
                if(response === 8001){
                  //set login data
                  AuthService.setLoginData({
                    msisdn:vm.phone,
                    password:vm.password,
                    autcode: vm.autcode, //get the autcode which is IMEI from device or from a randomly generated and persisted on device user
                    device: vm.device,  //get device name using cordova
                    token:vm.token, //get token from the reponse object
                    version: '4.0'
                  });
                  $state.go('loading');

                }
                else{
                  //show the user that security question is wrong
                }
              })


          }
          else{
            //show error message and go to register
            $state.go('register')
          }

        })

    };