title: iOS - AWS MobileHub sign in with developer authenticated provider
body: <p>I'm trying to understand how to sign in with a developer authenticated identity using AWS mobilehub's iOS SDK as recently AWS changed this SDK and I cannot find any documentation on this.
  The sample app fails to shed any light on this.</p>
  
  <p>I have a REST API to retrieve the cognito ID and Token but I'm not 
  sure what to do with them once I have this.</p>
  
  <p>AWS has the following different classes that futher complicate the issue:</p>
  
  <p>AWSCredentialsProvider,
  AWSCognitoCredentialsProvider (No longer available in new SDK),
  AWSSignInProvider,
  AWSAbstractCognitoIdentityProvider (no longer available in new SDK)</p>
  
  <p>There's now something called AWSAbstractCognitoIdentityProviderHelper..</p>
  
  <p>These are handled by the AWSIdentityManager which is part of AWSMobileHubHelper.framework however AWSIdentityManager doesn't let you
  set the credentials provider so I don't understand how I am meant to
  interact with it in this regard.</p>
  
  <p>Any tutorials, documentation, etc. would be much appreciated</p>