Open Config.inc.php under the PHPMyAdmin folder in editor, try the commented options under lines 11 and 13 to achieve different password protect features.

$i = 0;
/* Server: localhost [1] */
$i++;
$cfg['Servers'][$i]['verbose'] = 'localhost';
$cfg['Servers'][$i]['host'] = 'localhost';
$cfg['Servers'][$i]['port'] = '';
$cfg['Servers'][$i]['socket'] = '';
$cfg['Servers'][$i]['connect_type'] = 'tcp';
$cfg['Servers'][$i]['extension'] = 'mysqli';
$cfg['Servers'][$i]['auth_type'] = 'config';
// $cfg['Servers'][$i]['auth_type'] = 'http';
// A browser based prompt
// $cfg['Servers'][$i]['auth_type'] = 'cookie';
// A web page prompt rendered in HTML
$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = '123abc'; // Hack me!
$cfg['Servers'][$i]['AllowNoPassword'] = true;
/* End of servers configuration */
$cfg['DefaultLang'] = 'en-utf-8';
$cfg['ServerDefault'] = 1;
$cfg['UploadDir'] = '';
$cfg['SaveDir'] = '';