PDOException: SQLSTATE[08006] [7] connection to server at "127.0.0.1", port 5432 failed: FATAL:  password authentication failed for user "www-data"
connection to server at "127.0.0.1", port 5432 failed: FATAL:  password authentication failed for user "www-data" in /var/www/lib/classes/PGDatabase.php:16
Stack trace:
#0 /var/www/lib/classes/PGDatabase.php(16): PDO->__construct()
#1 /var/www/lib/autoload.php(19): PGDatabase::connect()
#2 /var/www/index.php(7): require_once('...')
#3 {main}Failed to connect to the database.