Problem with database!

PDOException: SQLSTATE[HY000] [1698] Access denied for user 'skins'@'localhost' in /var/www/html/skins/public_html/class/database.php:8
Stack trace:
#0 /var/www/html/skins/public_html/class/database.php(8): PDO->__construct()
#1 /var/www/html/skins/public_html/index.php(8): DataBase->__construct()
#2 {main}