Having trouble logging into the webui

I try logging into the webui using my username and password but it doesnt seem to be working is there a way to change it or a way around it weather it is change the username a password, adding a new user, etc. I appreate any help given.

so I reinstalled debian and made sure to remember the the user and password while reinstalling debian and mineos but when I try logging into the webui it doesnt seem to let me login at all still even with the correct information