Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1045] Access denied for user 'app_user'@'172.18.0.4' (using password: YES) in /var/www/html/Ocdb/PlqWebsite.php:42 Stack trace: #0 /var/www/html/Ocdb/PlqWebsite.php(42): PDO->__construct('mysql:host=db;p...', 'app_user', Object(SensitiveParameterValue)) #1 /var/www/html/public/index.php(7): Ocdb\PlqWebsite->__construct() #2 {main} thrown in /var/www/html/Ocdb/PlqWebsite.php on line 42