If your looking for features to turn off associates to each user you can something can try to create a Preference entity associate to Account as 1 to 1. Provide there modify changes access to Admin roles where they can turn on / off there features for each resource. Create a boolean for each feature. Before executing any feature check is it allowed for current user by getting current logged in user preferences best to use a sub microflow to return true of false.
If your looking stop users to login there is a default page “Account_Overview” can make any users to InActive using grid button.
Hope this Helps!
I'd probably create a ‘Settings’ entity in which you can store which sections are shut down. This entity could have for instance a boolean attribute AllowLogins. Then you can retrieve that object in certain locations to check whether the setting is enabled.