- Remove global `RootUserEmail` variable - Modify channel testing and user notification methods to use `GetRootUser()` - Update user cache and notification service to use more consistent user base type - Add new channel test notification type
- Remove global `RootUserEmail` variable - Modify channel testing and user notification methods to use `GetRootUser()` - Update user cache and notification service to use more consistent user base type - Add new channel test notification type