How to use the cartoview.apps_handler.config.CartoviewApp.objects function in cartoview

def commit(self):
        CartoviewApp.objects.update({self.name: self})
        return self

def add_carto_app(self):
        if not CartoviewApp.objects.app_exists(self.name):
            CartoviewApp({
                'name': self.name,
                'active': True,
                'order': self.get_app_order(),
                'pending': True
            })
            CartoviewApp.save()
        else:
            carto_app = CartoviewApp.objects.get(self.name)
            carto_app.pending = True
            carto_app.commit()
            CartoviewApp.save()

def load(cls, apps_dir=None):
        if os.path.exists(cls.get_apps_json_path()):
            with portalocker.Lock(
                    cls.get_apps_json_path(apps_dir=apps_dir), 'r',
                    portalocker.LOCK_EX) as jf:
                data = jf.read()
                CartoviewApp.objects.from_json(data)

def load_apps_urls():
    app_names = CartoviewApp.objects.get_active_apps().keys()
    for app_name in app_names:
        import_app_rest(app_name)
        urlpatterns.append(app_url(app_name))

def save(cls, apps_dir=None):
        with portalocker.Lock(
                cls.get_apps_json_path(apps_dir=apps_dir), 'w',
                portalocker.LOCK_EX) as jf:
            data = CartoviewApp.objects.to_json()
            jf.write(data)

def execute_pending(self):
        from cartoview.apps_handler.config import CartoviewApp
        CartoviewApp.load()
        pending_apps = CartoviewApp.objects.get_pending_apps().values()
        for app in pending_apps:
            _pending_apps = self.get_pending_apps(app.name)
            if _pending_apps:
                for _app in _pending_apps:
                    _app_name = _app.get('name', None)
                    _make_migrations = _app.get('makemigrations', False)
                    _migrate = _app.get('migrate', False)
                    if _app_name:
                        if _make_migrations:
                            self.makemigrations(_app_name)
                        if _migrate:
                            self.migrate(_app_name)
            else:
                self.migrate(app)
            self.collectstatic()
            carto_app = CartoviewApp.objects.get(app.name)