title: Django Rest API returns 403 error only on iOS when using react native
body: <p>I have a app which uses React Native as frontend and django as backend. When I try to fetch data from the API, it works perfectly fine on android but on iOS it returns a error 403 forbidden.</p>
  <p>In the django views, I have put the following inside every views:</p>
  <pre><code>permission_classes = [permissions.IsAuthenticated]
  </code></pre>
  <p>When fetching the API, I have put the following:</p>
  <pre><code>const userToken = await AsyncStorage.getItem('userToken');
  const headers = {&quot;Authorization&quot;: `Token ${userToken}`}
  </code></pre>
  <p>There are some views that can run on iOS. I notice that for those which cannot be run on iOS are those that I have customize the method in the views (say, I have override the get method in the view).</p>