I am trying to implement Push notifications on Android, using Mosquitto broker. So, different android application create topics based on tehir id on which they will receive notifications. To send notifications to those android applications we need the name of the topic. I am wondering if there is a way to notifiy an application whenever a new topic is created (a new android app is registered). This way, we will have a list of all the topics (so all the androi apps) and we can cpntact them by publishing on their topics.