Dietpi Software Install Password

I know this is a stupid question, but i’m having trouble finding the answer on internet searches. Could someone please explain how I can change the password for the software install user. I entered in a different password than root for it upon Installing DietPi on a Pine64 and like an idiot I did not write it down. Now when I install Phpmyadmin and try to login to the webpage, it asks for my username and password and from what I have read, I believe this password is the one needed to login to the Phpmyadmin console. :roll_eyes: