public function destroy($id)
{
$user = Auth::user();
$entry = UserContestEntry::where(['user_id' => $user->user_id])->findOrFail($id);
$contest = Contest::findOrFail($entry->contest_id);
priv_check('ContestEntryDestroy', $entry)->ensureCan();
$entry->deleteWithFile();
return $contest->userEntries($user);
}