public function getGuessingLeaderboard() {
$query = $this->winners()
->selectRaw('(select t2.uname from guessing_winners t2 where t2.uid = guessing_winners.uid order by created_at desc limit 1) as name, sum(score) as score')
+ ->where('score', '!=', 0)
->groupBy('uid')
->orderBy('score', 'desc')
->limit(10);