   function setFactoryAddress(address _newFactory) external override {
        ...
        factoryAddress = _newFactory;
    }
    function addToWhitelist(address _user) public override {
        IRCFactory factory = IRCFactory(factoryAddress);
        require(factory.isGovernor(msgSender()), "Not authorised");
        isAllowed[_user] = !isAllowed[_user];
    }
