Stuck with ViMbAdmin install

HI! i just installed clean EE and ee stack install --nginx --php7 --mysql --phpmyadmin --mail upon completion received: Configure ViMbAdmin: https://xxxx:22222/vimbadmin Security Salt: wdq…

go to https://xxxx:22222/vimbadmin see pop up box with : authentication required login and password.

so what login and password should i use? so confused / i didn’t setup any login/password during EE install

ok . got it this is nginx HTTP Auth