If you’re having trouble logging into a fresh install of phpMyAdmin, then simply use the following username and password:
The above login credentials belong to the default MySQL user account that gets created during a new install. Note that you should leave the password field completely blank. Do not actually type in *blank*.
If those details do not work, then you should open up the config.inc.php in your phpMyAdmin folder. Firstly make sure that AllowNoPassword is set to true:
You can also see what login credentials have been stored:
Hopefully, this article saved you some time and confusion!