phpmyadmin default username and password code example
Example: phpmyadmin first login
// in config.sample.inc.php change this to true
$cfg['Servers'][$i]['AllowNoPassword'] = false;
// in config.sample.inc.php add this
$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = '123';
// refresh