Inoic 1 Push Notifications

All tutorials that i’ve read about > Push Notifications in ionic only show how to send notifictions to a single user, by using it’s device token id. But what i want to do is to send notifications to all users who have installed my app (please ensure me that the solution is not to get every device token id and send notification to each user).
So any server or better way to manage that ?
Thank you.