To make it work:
- Download the source from github
- Create a folder inside dokuwiki/lib/plugins called authpdodrupal
- Paste the downloaded source inside authpdodrupal
- Navigate to your doku wiki config page (doku.php?id=start&do=admin&page=config)
- The first thing to do is to go to the Authentication page and change
Authentication backend
with authpdodrupal. Do not save yet. - Scroll down to the last row and you should see
Absolute path to a Drupal installation
there you have to specify a valid Drupal installation path - Save and everything should work.