unbanFromChat(chatID, userID) {
		userID = Helpers.steamID(userID);

		let msg = ByteBuffer.allocate(20, ByteBuffer.LITTLE_ENDIAN);
		msg.writeUint64(toChatID(chatID).getSteamID64()); // steamIdChat
		msg.writeUint64(userID.getSteamID64()); // steamIdUserToActOn
		msg.writeUint32(EChatAction.UnBan);
		this._send(EMsg.ClientChatAction, msg.flip());
	}
Unbans a user from a chat room.
@param {(SteamID|string)} chatID - The SteamID of the chat room to unban the user from (as a SteamID object or a string which can parse into one)
@param {(SteamID|string)} userID - The SteamID of the user to unban from the room (as a SteamID object or a string which can parse into one)
@deprecated This uses the old-style chat rooms, if you want new chat instead use this.chat