The first step when using is to login via the docker login command.

Enter your username and your encrypted password when prompted.

This installation requires encrypted passwords to be used on the Docker command line. To generate an encrypted password, visit the settings tab under your user page. 
sudo docker login {{ tour.tourScope.domainName }}
Username: {{ tour.tourScope.username }}
Password: (encrypted password here)
Email: {{ tour.tourScope.email }}