The user Entity

The user entity type connects the authenticated user to the data in the application that you create by using Application Builder.

The user entity is automatically created when the first backend is added to your Application Builder instance. By default, the user entity is connected to a Watson Explorer Engine search collection named user that is created automatically. The user collection is populated with the default Application Builder administrator user, data-explorer-admin.

The user entity type functions as a normal entity in all ways, except that it cannot be deleted, and it has the following extra attributes:
Application authorization
The authenticated user name is passed to Application Builder by WebSphere® Liberty profile. Application Builder maps the authenticated user name to a user entity instance and logs it in.
Application administration
Some user entity instances are explicitly identified as administrators. Administrators are the only users who can access the Application Builder administration tool.
Home page
The Application Builder home page is typically configured to be applicable to the user who is logged in.
To identify your application administrators and users, you can add to the user search collection, connect the user entity to a different search collection, or use a directory instead of a collection to populate the user entity.