Fix top-voted-users query.

-- get users with most upvotes

SELECT

    user.username,

    users.username,

    SUM(c.vote) AS votes

FROM users JOIN voted_comments c ON c.user_id = users.id

GROUP BY user.id

FROM users LEFT JOIN voted_comments c ON c.user_id = users.id

GROUP BY users.id

ORDER BY votes DESC

LIMIT 10;