userProcessorSource

Uses the provided value to attach the Session optional user data processing pipeline to once built. The provided Source is normally attached to when user data is required to be presented as part of image processing and de-attached once the user data is not needed anymore. Providing the Source is optional as user data is optional, it does not change the any aspect of business logic. The main advantage of providing the Source of user data is to get extra personalization in generated content such as displaying user name in lenses.