title: Nelmio Docs is returning 401 Undocumented
body: <p>When I try to execute API route without authentication, it returns correct message but there in the code I see <code>401 Undocumented</code>. Is this undocumented normal? where should I fix it. I have attached an image below:</p>
  <h2>yaml file:</h2>
  <pre><code>nelmio_api_doc:
      documentation:
          securityDefinitions:
              my_token:
                  type: apiKey
                  description: 'token'
                  name: token_name
                  in: header
  </code></pre>
  <p><a href="https://i.stack.imgur.com/3N1Uh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3N1Uh.png" alt="401 Undocumented" /></a></p>