Logged In: YES
user_id=1387746

this can be solved by this while loop that asks the user for
a title:
//CODE
while [[ -z $DISK_TITLE ]] || [[ $DISK_TITLE == "unknown"
]]; do
clear
echo -n "Could not fetch DVD title name. Enter the title> "
read -e DISK_TITLE
done
//CODE_END