How to Hide the "Certificate Validator" Admin Menu

function plt_hide_virtualbadge_io_certificate_validator_menus() {
	//Hide the "Certificate Validator" menu.
	remove_menu_page('openai-descgen');
}

add_action('admin_menu', 'plt_hide_virtualbadge_io_certificate_validator_menus', 11);

Where do I put this code?