Não conectado ao Banco de Dados!

PDOException: SQLSTATE[HY000] [1045] Access denied for user 'barbearia'@'localhost' (using password: YES) in /www/wwwroot/saasbarber.top/sistema/conexao.php:18 Stack trace: #0 /www/wwwroot/saasbarber.top/sistema/conexao.php(18): PDO->__construct() #1 /www/wwwroot/saasbarber.top/cabecalho.php(1): require_once('/www/wwwroot/sa...') #2 /www/wwwroot/saasbarber.top/index.php(1): require_once('/www/wwwroot/sa...') #3 {main}
Fatal error: Uncaught Error: Call to a member function query() on null in /www/wwwroot/saasbarber.top/sistema/conexao.php:31 Stack trace: #0 /www/wwwroot/saasbarber.top/cabecalho.php(1): require_once() #1 /www/wwwroot/saasbarber.top/index.php(1): require_once('/www/wwwroot/sa...') #2 {main} thrown in /www/wwwroot/saasbarber.top/sistema/conexao.php on line 31