title: Trying to configure throws error
body: <p>I am confused about aws-sdk for react, trying to configure it throws error which is a bit confusing, considering the object looks fine in the debugger, but the moment that I step over it throws error: <code>TypeError: Unable to get property 'config' of undefined or null reference</code></p>
  
  <p>the code:</p>
  
  <pre><code>import {AWS, CustomEvent, AMA} from 'aws-sdk';
  
  class App extends Component {
      constructor(props) {
  
      debugger;
      AWS.config.region = 'us-east-1';
      ...
  </code></pre>
  
  <p>I assumed that once imported the AWS included config object, and if I were to attach with debugger (at the <code>debugger;</code> line) the AWS object looks good and so does the AWS.config and further AWS.config.region is set to null, but if I step, it throws the above error....  Any thoughts what may be misconfigured?</p>