 
 	public var privateChat: Bool { return message.chat.type == .privateChat }
 	public var chatId: Int64 { return message.chat.id }
-	public var fromId: Int64 { return message.from.id }
+	public var fromId: Int64? { return message.from?.id }
 	
 	init(bot: TelegramBot, update: Update, scanner: NSScanner, command: String) {
 		self.bot = bot

	public func respondPrivatelyAsync(_ userText: String, groupText: String,
	                                  onDidSendToUser userCompletion: TelegramBot.SendMessageCompletion? = nil,
	                                  onDidSendToGroup groupCompletion: TelegramBot.SendMessageCompletion? = nil) {
		bot.sendMessageAsync(chat_id: fromId, text: userText, completion: userCompletion)
		if !privateChat {
			bot.sendMessageAsync(chat_id: chatId, text: groupText, completion: groupCompletion)
		}

	}
	
	public func respondPrivatelySync(_ userText: String, groupText: String) -> (userMessage: Message?, groupMessage: Message?) {
		var userMessage: Message?
		if let fromId = fromId {
			userMessage = bot.sendMessageSync(chat_id: fromId, text: userText)
		}
		let groupMessage: Message?
		if !privateChat {
			groupMessage = bot.sendMessageSync(chat_id: chatId, text: groupText)
