public async Task AddToGroup(int auctionId) { if (await _auctionService.CanConnect(auctionId, Context.User.GetUserId())) { await Groups.AddToGroupAsync(Context.ConnectionId, $"Auction {auctionId}"); } else { await SendPrivateMessage(Context.UserIdentifier, "InvalidAuction", $"Unable to connect to auvtion ID = {auctionId}"); } }