Refresh all data related to a channel

When a user is online, all data associated with the group channels they are a member of are automatically updated. However, when a user is disconnected from the Sendbird server and reconnects later, the refresh() method should be called to update the user's group channels with the latest information.

await channel.refresh();

Note: If you want to provide the updated channels with the latest information when your user's app is in the foreground, call the refresh() method within the onReconnectSucceeded() property which receives a callback from the Sendbird server when successfully reconnected.