I am attempting to start Ubuntu via VirtualBox on Windows 10, but  Ubuntu requests a login password for the "Developer" account, while installation guide assumes automatic login.

Can I ask for the password or is there any other way to successfully start Ubuntu?  

For the installation and setup, I followed  the Windows VM Install & Setup (MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://surfer.nmr.mgh.harvard.edu/fswiki/VM_67_win), using the virtual disk image of the VM Ubuntu_710_clone_2.7z (downloaded on Dec 29, 2020).

Thank you very much,

Kanon Fujimoto