Hello everyone, I'm new to PHP and Drupal and I wonder how hard it would be to write a script to authenticate a user using drupal's authentication mechanism. Ideally, I'd like to pass a user name and password to that script and receive a True/False depending on whether or not that user name/password matches the ones of a user registered in my site. The script would be called from either the unix shell or from another application. In addition to that, depending on the complexity, I also would like to have a script to check if a certain user belongs to a specified organic group (og). Any hints on how to implement any of those scripts? Are there examples of scripts like those that I could have a look at? Thanks in advance for your help, Leo