This package is for the Community Store package for ConcreteCMS.
It lets you accepts payments with Nexi, with the X-Pay Web implementation (for Intesa Sanpaolo bank customers) or with the X-Pay implementation (for other customers).
In order to test the X-Pay Web implementation you don't need to do anything: this package provides sample test credentials.
To test the X-Pay implementation you'll instead need to create a free account in the Nexi test portal.