Managing user access to data is a fundamental aspect of data platforms, and Role-Based Access Control (RBAC) is a common method to accomplish this in Druid. Basic RBAC in Druid allows limitations on READ and WRITE access at the datasource level, while Imply View Manager, an experimental feature in the Imply Druid distribution, enables more granular control by restricting access to specific rows and columns. Imply Views act like traditional database views, providing object definitions over a datasource without duplicating data, thus implementing row and column-level security. The Imply View Manager requires specific READ and WRITE permissions granted via the Druid UI or APIs and is managed by an extension loaded during cluster startup. The document provides detailed examples of how to create views and assign user permissions using the Druid console and API, demonstrating the effectiveness of Imply Views in enhancing data security.