public async Task NotifyNewMessageAsync(uint groupId)
{
ChatHub hub = hubs.GetOrAdd(groupId, new ChatHub(groupId, logger));
await hub.Notify(NotificationType.NewMessage, new CancellationToken());
}
public async Task NotifyConnectedAsync(uint groupId, Guid user)
{
ChatHub hub = hubs.GetOrAdd(groupId, new ChatHub(groupId, logger));
await hub.Notify(NotificationType.UserConnected, new CancellationToken());
}