We just started using scm-manager. We are using Active Directory to authenticate our users. As the administrator of the system, I created users for each of the developers - giving them the appropriate permissions.
When they tried to log in with their AD accounts, they couldn't because scm-manager thought they were xml user types rather than AD. I was able to get around this by editing the config file, but it'd be a nice option to toggle user types when creating the user.