public function countPerUser($userId)
{
return ProjectArtifactId::join('project_versions', 'project_artifact_ids.id', '=', 'project_versions.project_artifact_id_id')->join('test_runs', 'project_versions.id', '=', 'test_runs.project_version_id')->where('test_runs.user_id', '=', $userId)->groupBy('project_artifact_ids.id')->get()->count();
}
