php undefined property of an object

I'm sure this is more simple than I'm making it.

The error that I get...

Notice (8): Undefined property: Cake\Database\Connection::$config [... line 73]

The code on line 73...

Line 72: debug($conn);
Line 73: debug($conn->config);

Here's what $conn equals

$conn = object(Cake\Database\Connection) {

    'config' => [
        'password' => '*****',
        'username' => '*****',
        'host' => '*****',
        'database' => '*****',
        'driver' => 'Cake\Database\Driver\Postgres',
        'persistent' => false,
        'encoding' => 'utf8',
    ],
}

Anyone know why $conn->config isn't the right syntax?