If it helps, this is what I’ve provided with my backup image:
Details on how to restore the dd *.bin file:
NOTE
This image backup will format the attached PiDrive to a fresh install of Nextcloud. To maintain the version previously installed prior to the sdcard failing, follow the instructions on the below link, changing the target drive back to /dev/sda2
Username and password are the default:
u: ubuntu
p: ubuntu
Change this as soon as is convenient:
$ sudo adduser yournewusername
$ sudo adduser yournewusername sudo
(the second line gives the user account sudo privileges)
Log out and in with the new user
$ sudo passwd -l ubuntu
This will disable the default ubuntu user and all further logins would need to be done with the newly created user.