MongoDB Authentication and Automation allows for role-based access control, enabling users to restrict access to their MongoDB deployment for safety and security. Cloud Manager Automation simplifies the process of enabling and managing users, roles, and authentication settings. When setting up authentication, users must create a new automation draft with new users and review and deploy the changes. Roles can be added, edited or removed, and custom roles are supported. Users can be created, edited or deleted, and built-in user accounts cannot be modified. Removing authentication involves disabling it through Cloud Manager Automation. The process allows for flexibility in managing MongoDB access control, ensuring that only authorized users have access to the deployment.