title: Appsync Cognito User Pools login with OIDC provider
body: <p>I've created an AppSync GraphQL API with Amazon Cognito User Pool as the default authorization mode. I have set up Amazon Cognito user pools as well and I can confirm I can create new users who can login. I can also login with the credentials from my OIDC provider (keycloak).</p>
  
  <p>The problem is querying from Appsync Queries console. I am able to 'login with user pool' using users that I have created. However I am unable to login with user pools using the credentials from the OIDC provider.</p>
  
  <p>Is there something I am missing? Really appreciate it!</p>
  
  <p>Cheers!</p>