title: Post with REST API on Wordpress.com [Error 401, not allowed]
body: <p>I want to post articles with rest on one of my wordpress.com websites (wordpress website hosted on the free wordpress.com platform).</p>
  
  <p>Endpoint, GET on: <code>https://public-api.wordpress.com/wp/v2/sites/donnadulcinea.wordpress.com/posts</code></p>
  
  <p>With Basic-Auth header. Body of the request (for test),</p>
  
  <pre><code>{"title":"New Rest Post"}
  </code></pre>
  
  <p>Response:</p>
  
  <pre><code>{
      "code": "rest_cannot_create",
      "message": "Sorry, you are not allowed to create posts as this user.",
      "data": {
          "status": 401
      }
  }
  </code></pre>
  
  <p>What's wrong? Where may I found one final example for a really simple posting on a wordpress.com domain?</p>