get arguments as string

commands.cpp

	const EncodableValue* value = call.arguments();
	if (std::holds_alternative<std::string>(*value)) {
		std::string ip = std::get<std::string>(*value);
		const char* ipchar = ip.c_str();
		char* ipcharDump = _strdup(ipchar);
		printf("CMD_SET_CURRENT_IP: %s\n", ipcharDump);
		Backend_SetCurrentIP(ipcharDump);
		free(ipcharDump);
	}