Missing authentication

[zaporylie]

Hi
I'm trying to integrate PDF Crowd with Drupal but I found out that one desirable method is missing. I'd like to have option to check if user has access to PDF Crowd service before sending convert request so I can set warning message about it. Something like:
$pdfcrowd = new Pdfcrowd("username", "apikey");
if(!$pdfcrowd->checkAccess()) { // Returns TRUE or FALSE
// Inform user and stop PDF processing.
}