title: Wordpress and author__in
body: <p>I manipulate a query with pre_get_posts</p>
  
  <p>But i want to show posts of multiple authors.</p>
  
  <p>These for i use "author__in".</p>
  
  <pre><code>$query-&gt;set('author__in', [53, 285]);
  </code></pre>
  
  <p>But my query still runs with 2 post_author parameters. How can i exclude the second one?</p>
  
  <pre><code>SELECT SQL_CALC_FOUND_ROWS wp_posts.ID
  FROM wp_posts 
  WHERE 1=1
  AND wp_posts.ID IN (349956,327745,177707)
  AND wp_posts.post_author IN (53,285)
  AND (wp_posts.post_author = 53)
  AND wp_posts.post_type = 'post'
  ORDER BY wp_posts.post_date DESC
  LIMIT 0, 10
  </code></pre>