Default Config / New User

Hello everyone,
we have a customer with a Citrix farm environment and are currently trying to automatically assign the data source and license information to new users. The license information is already stored in the data source (SQL Server).
Unfortunately, there is no way to define the data source via GPO (would be a great feature!), and attempts to file a Default.cfg under %appdata%\Devolutions\RemoteDesktopManager unfortunately didn't help either.
Please give feedback on how to easily assign a data source and license to a new user.
Thanks very much!

Regards,
Martin