title: How to authenticate user with Amazon Cognito Indentity Provider for Xamarin .net
body: <p>I need sample/tutorial for using CognitoIdentityProvider in mobile Apps with Xamarin DotNet. (Currently in beta and no documentation, but nuget is available)</p>
  
  <p>I'm success creating code for SignUp and Confirm user but struggling how to authenticate user login after successfull sign up confirm.</p>
  
  <p>Anyone can help?</p>