Is there a way to unsubscribe all users from a topic in Firebase Cloud messaging without knowing the tokens? Basically, "delete" the topic?
It would be really really painful to do this manually since it should happen with a document change trigger, meaning the function would somehow have to know all the user tokens. So it's either a function/set of functions for "get all tokens for topic, then unsubscribe all of them", or "delete topic". Are there any solutions to this?