Fetching Specific user from firebase

Question

I have 10 users in my Firebase user node, they are

1. Diva
2. Ziva
3. Destiny
4. Daniel
5. James
6. Zionnite (This is Me)
7. Jessy
8. Johan
9. Precious
10. Kings

and I have a code that lists all users from my user list, the code:

service.js:

app.service("ListAllUserService",function($q, $rootScope, $ionicPopup, $firebaseAuth, $firebaseObject, $firebaseArray, $localStorage, $ionicLoading){
    var self    ={
        'data'  : '',
        'Loading':  true,
        "hasMore":true,
        "page":10,
        "next_page":3,
        'users' :   '',
        'lastKnownDomainValue': [],
        'ListUser': function(){
        var deferred = $q.defer();
            var usersRef  = new Firebase("https://bigzill.firebaseio.com/users");
            var usersRef2  = new Firebase("https://bigzill.firebaseio.com");

            var authData = usersRef.getAuth();
            $rootScope.scrollRef = new Firebase.util.Scroll(usersRef,"username");

            if(authData){
                    self.users    = $firebaseArray($rootScope.scrollRef);
                                        $rootScope.scrollRef.scroll.next(self.page);
                                        self.Loading   =false;
                                    deferred.resolve(self.users);
            }else{
                console.log("User not Authenticated");
                deferred.reject(data);
            }
            return deferred.promise;
        }
    }
    self.ListUser();
    return  self;
});

controller.js:

app.controller('ListAllUserCtrl', function($scope, $rootScope, $state, $ionicPopup, $firebaseAuth, $firebaseObject, $firebaseArray, PresenceService, $localStorage, $ionicLoading, ListAllUserService){

    $scope.Get  =ListAllUserService;

    $scope.LoadAllUser  =function(){
        $ionicLoading.show({template:'Loading...'});
        $scope.Get.ListUser().then(function(data){
            $scope.users    =data;
            console.log($scope.users);
            $ionicLoading.hide();
        });
    }
    $scope.LoadAllUser();

});

I want to make sure that the logged in user is not displayed from the return results.

1. Diva
2. Ziva
3. Destiny
4. Daniel
5. James
6. Jessy
7. Johan
8. Precious
9. Kings

You see zionnite is no longer in the list.