title: 401 (rest_comment_login_required) when posting comment on WordPress 4.7.0 with basic auth
body: <p>I'm trying to post a comment to WordPress (4.7.0) using basic authentication as described in the <a href="https://developer.wordpress.org/rest-api/using-the-rest-api/authentication/" rel="nofollow noreferrer">documentation</a> and in <a href="https://code.tutsplus.com/tutorials/wp-rest-api-setting-up-and-using-basic-authentication--cms-24762" rel="nofollow noreferrer">WP REST API: Setting Up and Using Basic Authentication</a>.</p>
  
  <p>However, I keep getting 401 errors back.</p>
  
  <pre><code>{"code":"rest_comment_login_required","message":"Sorry, you must be logged in to comment.","data":{"status":401}}
  </code></pre>
  
  <p>I activated the basic authentication plugin which then should turn this call into an authenticated call, right?</p>