title: How do I filter fields with Directus
body: <p>Let's say I make an api call like this</p>
  <pre><code>    const { data } = await client.getItems(`module/${module.id}`, {
        fields: [
          'questions.module_question_id.question_text',
          'questions.module_question_id.slug',
          'questions.module_question_id.type',
          'questions.module_question_id.answer_options.*',
        ],
      });
  </code></pre>
  <p>I am grabbing the fields, but I also want to filter out a certain question ala its slug, is there a way to do this at the api level? I know filters exist as a <a href="https://docs.directus.io/reference/api/query/" rel="nofollow noreferrer">global query api</a>, but have not found examples of them being used in conjunction with fields.</p>