fixes #789, add url param hide_redirect_error

identification.php

@@ -53,7 +53,7 @@ $redirect_to = '';
 if ( !empty($_GET['redirect']) )
 {
   $redirect_to = urldecode($_GET['redirect']);
-  if ( is_a_guest() and $conf['guest_access'] )
+  if ( $conf['guest_access'] and !isset($_GET['hide_redirect_error']))
   {
     $page['errors'][] = l10n('You are not authorized to access the requested page');
   }