PMA\libraries\Util::clearUserCache PHP Method

    public static function clearUserCache()
    {
        self::cacheUnset('is_superuser');
        self::cacheUnset('is_createuser');
        self::cacheUnset('is_grantuser');
    }

 /**
  * Stores user credentials after successful login.
  *
  * @return void|bool
  */
 public function storeUserCredentials()
 {
     global $cfg;
     // Name and password cookies need to be refreshed each time
     // Duration = one month for username
     $this->storeUsernameCookie($cfg['Server']['user']);
     // Duration = as configured
     // Do not store password cookie on password change as we will
     // set the cookie again after password has been changed
     if (!isset($_POST['change_pw'])) {
         $this->storePasswordCookie($cfg['Server']['password']);
     }
     // Set server cookies if required (once per session) and, in this case,
     // force reload to ensure the client accepts cookies
     if (!$GLOBALS['from_cookie']) {
         // URL where to go:
         $redirect_url = './index.php';
         // any parameters to pass?
         $url_params = array();
         if (mb_strlen($GLOBALS['db'])) {
             $url_params['db'] = $GLOBALS['db'];
         }
         if (mb_strlen($GLOBALS['table'])) {
             $url_params['table'] = $GLOBALS['table'];
         }
         // any target to pass?
         if (!empty($GLOBALS['target']) && $GLOBALS['target'] != 'index.php') {
             $url_params['target'] = $GLOBALS['target'];
         }
         /**
          * Clear user cache.
          */
         Util::clearUserCache();
         Response::getInstance()->disable();
         PMA_sendHeaderLocation($redirect_url . PMA_URL_getCommon($url_params, 'text'), true);
         if (!defined('TESTSUITE')) {
             exit;
         } else {
             return false;
         }
     }
     // end if
     return true;
 }