This package requires Combu (min. version 2.1), that you must own prior to use this asset or purchase before on Asset Store.
If you need a license manager for your awesome game/app, to manage licenses as monthly/yearly subscriptions or timed/launches expiration trials then this asset is what you’re looking for!
It is not meant to replace or work as a full featured DRM manager, but it will fit your needs if your game/app requires online access (as it is most likely, if you are using Combu) with a subscription plan.
More Info: _https://assetstore.unity.com/packages/tools/network/license-manager-for-combu-46256