public IObservable <Unit> Execute()
=> syncManager.Freeze()
.FirstAsync()
.SelectMany(_ => database.Clear())
.Do(shortcutCreator.OnLogout)
.Do(userPreferences.Reset)
.Do(privateSharedStorageService.ClearAll)
.Do(_ => analyticsService.Logout.Track(source))
.SelectMany(_ =>
notificationService
.UnscheduleAllNotifications()
.Catch(Observable.Return(Unit.Default)))
.Do(userAccessManager.OnUserLoggedOut)
.Do(analyticsService.ResetAppCenterUserId)
.FirstAsync();