Cannot connect to database !!

exception 'PDOException' with message 'SQLSTATE[28000] [1045] Access denied for user 'root'@'localhost' (using password: YES)' in /var/www/html/downloads/dric_search/php/Connection.simple.php:10 Stack trace: #0 /var/www/html/downloads/dric_search/php/Connection.simple.php(10): PDO->__construct('mysql:host=loca...', 'root', 'Tr0u5L3Ha2r9') #1 /var/www/html/downloads/dric_search/index.php(5): dbConnect() #2 {main}