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Hi everybody! - I started using pulumi and I not sure how to do it, maybe if anyone can help it will be great.
I'm creating a IAM Role and I need to attach to an existent  aws policy
```const roleES = new aws.iam.Role(`es-role-test`, {
   name: `CognitoAccessForAmazonES`,
   assumeRolePolicy: {
   Version: '2012-10-17',
   Statement: [
   {
     Effect: 'Allow',
     Principal: {
        Service: '<http://es.amazonaws.com|es.amazonaws.com>',
     },
     Action: 'sts:AssumeRole',
     Sid: '',
   },
 ],
}```
  I wanna add the `AmazonESCognitoAccess`

Use an _aws.iam.RolePolicyAttachment_ resource.