title: Finding necessary nodes with rvest: all attempts result in {xml_missing}
body: <p>I am trying to scrape my own LinkedIn page for data to later put into an Rmarkdown resume.</p>
  
  <p>I started out with <a href="https://gist.github.com/daattali/3868f67e60f477c8c0f0" rel="nofollow noreferrer">this gist</a>. However, it is 2 years old, and doesn't work anymore.
  This segment seems to be working:</p>
  
  <pre><code>user_url &lt;- "https://www.linkedin.com/in/___yourprofilepagehere____/"
  
  username &lt;- 'your_login'
  password &lt;- 'your_password'
  
  library(rvest)   
  
  linkedin_url &lt;- "https://linkedin.com/"
  pgsession &lt;- html_session(linkedin_url) 
  pgform &lt;- html_form(pgsession)[[1]]
  filled_form &lt;- set_values(pgform,
                            session_key = username, 
                            session_password = password)
  
  submit_form(pgsession, filled_form)
  
  pgsession &lt;- jump_to(pgsession, user_url)
  page_html &lt;- read_html(pgsession)
  </code></pre>
  
  <p>Inspecting <code>page_html</code> with <code>html_text()</code> tells us that the needed information is in the object.
  However, I have no idea which nodes to call to extract that data. Original code isn't working anymore.
  I tried SelectorGadget plugin for Chrome, as well as inspecting the page to find a relevant CSS node or an xpath, but every attempt results in this:</p>
  
  <p><code>{xml_missing}
  &lt;NA&gt;</code></p>
  
  <p>E.g. SelectorGadget seems to be identifying this as a node for position titles: <code>.pv-position-entity h3</code></p>
  
  <pre><code>page_html %&gt;% html_node('.pv-position-entity h3')
  {xml_missing}
  &lt;NA&gt;
  </code></pre>
  
  <p>Are there steps I'm missing here? Can anyone help please?
  Thank you!</p>