title: Custom render of Spring Oauth2 errors
body: <p>How can I change the render of Spring Oauth2 errors? For example when you try to access rest resource which is protected without providing <code>Bearer</code> header, this error is rendered by Spring Framework :</p>
  
  <pre><code>&lt;oauth&gt;
  &lt;error_description&gt;Full authentication is required to access this resource&lt;/error_description&gt;
  &lt;error&gt;unauthorized&lt;/error&gt;
  &lt;/oauth&gt;
  </code></pre>
  
  <p>I want it to render like my other API responses and error messages which I am handling with @ControllerAdvice and @ExceptionHandler annotations.</p>
  
  <p>I have tried to provide WebResponseExceptionTranslator but it only triggers when I provide bad credentials.</p>
  
  <p>I see that the <code>DefaultOAuth2ExceptionRenderer</code> is responsible for rendering this errors, but could not manage to change it.</p>