Catching Auth errors

Not sure where to put this because it's not a bug per se; it's more of an enhancement suggestion or, even more likely, I'm just missing something obvious, but... When using Auth, I'm having a really hard time trapping errors. For instance, I'm using the following code to instantiate the class: $params = array( 'dsn' => 'pgsql://someone:somewhere@localhost/thisdb', 'table' => 'employees', 'usernamecol' => 'employee', 'passwordcol' => 'securepwd' ); $security = new Auth('DB',$params); This works well; however, you can change the dsn to whatever you want and there is no rejection message other than the standard AUTH_WRONG_LOGIN. It would be nice if the Auth class had an error object similar to DB's DB_Error. Or, as I say, am I missing something fundamental here? Ben