One Vizlib user license allows an individual to use a Vizlib product in their Qlik Sense environment based on their respective UserID and User directory. This is the same whether they are an app developer, app user or end-user. A Vizlib license will account for all use cases for that one named user and is the same as an assigned Qlik Sense token.
As a consequence, if a user has the same User directory/User ID in several environments, then only one Vizlib license will be consumed.
On the other hand, a user may have the same user ID from different User directories. In this case, separate Vizlib licenses will be consumed.
QS environment A:
David Alcobero: User Directory=Vizlib User ID= David.Alcobero
QS environment B:
David Alcobero: User Directory=Acme User ID= David.Alcobero
QS environment C:
David Alcobero: User Directory=Vizlib User ID = David.Alcobero
When David logs into all three QS environments, two Vizlib licenses will be consumed.
UserIDs in the Qlik Sense Server Management console: