protected function deletePersonalWorkspace($accountIdentifier)
    {
        $userWorkspace = $this->workspaceRepository->findByIdentifier(UserUtility::getPersonalWorkspaceNameForUsername($accountIdentifier));
        if ($userWorkspace instanceof Workspace) {
            $this->publishingService->discardAllNodes($userWorkspace);
            $this->workspaceRepository->remove($userWorkspace);
        }
    }