//@audit-issue => No access control to restrict who can set the address of the router contract
function setRouter(address _router) public {
    router = _router;
}
    //@audit-info => Only the router can call the mint()
    function mint(address _to, uint256 _amount) public onlyRouter {
        _mint(_to, _amount);
    }

    //@audit-info => Only the router can call the burn()
    function burn(address _from, uint256 _amount) public onlyRouter {
        _burn(_from, _amount);
    }
