title: devdefined OAuth IConsumerRequest error
body: <p>I'm getting this error: </p>
  
  <p>"For the RSASSA-PKCS1-v1_5 signature method you must use the constructor which takes an additional AssymetricAlgorithm "key" parameter" </p>
  
  <p>when I try to make a request with my IOAuthSession object.</p>
  
  <p>I assume its referring to IOAuthSession constructor but IOAuthSession doesn't have a "key" parameter in the constructor.</p>
  
  <p>Here's my code:</p>
  
  <pre><code>IOAuthSession consumerSession = new OAuthSession(consumerContext, requestTokenUrl,     UserAuthoriseUrl, accessTokenUrl);
  
     IConsumerRequest getOrganisationRequest = consumerSession
              .Request()
              .ForMethod("GET")
              .ForUri(new Uri("https://api.xero.com/api.xro/2.0/Organisation"))
              .SignWithToken(accessToken);
  </code></pre>
  
  <p>Any Help will be much appretiated.</p>