Is there a way to obtain the list of clients who have registered for a particular topic in Firebase Cloud Messaging (FCM)?
I am planning to subscribe each client devices' location info as a topic. Later, when I want to get all devices in an area, I can just get a list of clients in that specific area. For example, clients in a sublocality 'Sharafiyah' can be listed under
topics/SA/Jeddah/Sharafiyah
