Currently, in order to enable or disable Sally for a Slack user, you have go to User Management and change the dropdown from All Users to Slack > name of Workspace > then select user and click on the three dots and choose disable or enable.
It would be easier to have an option within the User record to allow Sally access for Slack enabled users similar to how License Type or Permission bundle can be modified. This is far fewer clicks when updating just a handful of users to enable/disable Sally.