title: How do I run an autocomplete $search on multiple fields?
body: <p>The <a href="https://docs.atlas.mongodb.com/reference/atlas-search/autocomplete/#autocomplete-ref" rel="noreferrer">documentation</a> states that the <code>path</code> needs to be a <code>string</code> and not an array of strings. I just want to confirm that that is in fact the only possibility, and if, in either case, there is a recommended way to do this.</p>
  <p><em>e.g.</em> I want to search (with autocompletion) my movies for the text <code>&quot;hammer&quot;</code> on both the <code>title</code> and the <code>plot</code></p>
  <p>In the current scenario I can implement a search by either <code>title</code> or <code>plot</code> with ease. But If I try to do it for both, making <code>path</code> an array of strings, which is acceptable on other operators, I get an error</p>