What is NOT an available sortable attribute for top users in Dynatrace?

User ID is not an available sortable attribute for top users in Dynatrace. While Dynatrace provides a comprehensive view of user behavior and performance through various metrics, the focus is often on aspects that are more relevant to understanding user engagement and experience, such as session duration, actions per session, and errors or crashes experienced. User IDs are primarily used for identification purposes and do not contribute to understanding the engagement level or user experience on a broader scale. Instead, the metrics that reflect user interaction, like average session duration or the number of actions per session, provide deeper insights into how users interact with an application, making them more valuable for sorting and analyzing user data.