I am in the process of integrating amember into my existing drupal site. I have the drupal plugin. When I add a user through amember/signup.php, the user also gets added to drupal user's table, but I am unable to login through amember/member.php with preexisting drupal users. There is a lot of content associated with a user so I want to avoid deleting the user out of the users table and importing into amember followed by a rebuild. Any recommendations?