Use the following command:
wget -r -np -nd --accept=gz --no-check-certificate https://www.xxx.com/dir/ --http-user=username --http-password=passwordwget -r -np -nd --
Use the following command:
wget -r -np -nd --accept=gz --no-check-certificate https://www.xxx.com/dir/ --http-user=username --http-password=passwordwget -r -np -nd --