Get list of all subscribed users for application subscriptions

Using the reference as these two threads Is there a way to add notifications at the wiki application level like there is for wiki page and wiki comment notifications?  and Wiki Application subscriptions 

Trying to create a  notification when a wiki page is added to wiki applications. In order to retrieve the list of subscribers using below code

Apis.Get<IApplicationSubscriptions>().List(new ApplicationSubscriptionListOptions { PageIndex= 0, PageSize = 100  });

and the list is giving only the contextual users' data. Is there any way to retrieve list of all users who are subscribed to the application .