Mashup Builder > Data Services and Linking > User
In the mashup builder, the User tab provides access to the User Extensions. The User Extensions are the properties of the logged-in user and can be used on the client and the server side.
To customize User Extensions, open the UserExtensions ThingShape and customize the properties.
To access the User Extensions from the service side, click Resources in the Composer, and open the CurrentSessionInfo resource to edit the services.