Login Error phpmyadmin on Centos 7

#1
Hi guys, i'm really new to this linux world.
so installed OLS, PHP7 , Mariadb based on this site's tutorials on my Centos 7, and it's working properly. and then i'm trying to install phpMyAdmin, it's also based on this site's tutorial ( https://openlitespeed.org/kb/phpmyadmin-on-openlitespeed/ ), and it's also working properly, but when i'm trying to Log In, it says " #1045 - Access denied for user 'pebriancharliady'@'localhost' (using password: YES) " and " mysqli_real_connect(): (HY000/1045): Access denied for user 'pebriancharliady'@'localhost' (using password: YES) " , which username and password must i use ? is it the Mariadb one ?
I appreciated you guys if you can help me with this little problem, i'm really new to this linux-thing.
sorry if you don't understand this, english is not my first language.

THANK YOU IN ADVANCE php.PNG
 
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