Debian sudo password

I have recently install Debian Vitual box. but not sure what is the Sudo password. I did not check while installing. can any one help

Where did you install the Debian from? The password will be written on the website where you installed it from.

I have now resolved it. I have followed the article in this linux - How do I log into a new virtualbox debian machine? - Super User, I have to basically add the user to the sudoers file. the user Vboxuser was not added into the file and I have to add it. Thank you