What is the method to obtain the number of subscribed users on a private channel in Pusher?

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To obtain the number of subscribed users on a private channel in Pusher, you can use the pusher:subscription_succeeded event, which is triggered when a new user subscribes to a channel. You can listen for this event and keep track of the number of subscribed users on the channel.

Here's an example code snippet in JavaScript:

var channel = pusher.subscribe('private-channel');

channel.bind('pusher:subscription_succeeded', function(members) {
  console.log('Number of subscribed users:', members.count);
});

In this example, members is an object that contains the new subscription information. members.count returns the number of subscribed users on the channel.