Textract using Javascript in browser - Unable to connect

I am trying to configure Textract to use the AnalyzeId method for my web application. I created an Identity Pool in Cognito, applied the 'AmazonTextractFullAccess' policy to the Unauth role, and got the region and PoolId for the role. When I use the following line to import the SDK, I get the following error:

AWS.Textract is not a constructor

So I decided to build my own SDK with the SDK Builder. I included AWS.Textract and AWS.CognitoIdentity. When I do this, I get the following error:

AccessDeniedException: User: arn:aws:sts::554864403737:assumed-role/Cognito_KripkeRetailUnauth_Role/CognitoIdentityCredentials is not authorized to perform: textract:AnalyzeID because no session policy allows the textract:AnalyzeID action

I'm not sure what I am doing wrong and have been unable to find a solution so far. Any help would be appreciated. Thanks.

Javascript:

<script src="https://sdk.amazonaws.com/js/aws-sdk-2.410.0.min.js"></script>
<script language="JavaScript">
AWS.config.region = 'us-east-2';
AWS.config.credentials = new AWS.CognitoIdentityCredentials({
     IdentityPoolId: 'us-east-2:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'
});
var textract = new AWS.Textract();

var params = {
     DocumentPages: [ 
     {
        Bytes: <<image>>
      },
  ]
};
            
textract.analyzeID(params, function(err, data) {
     if (err) console.log(err, err.stack); // an error occurred
     else     console.log(data);           // successful response
     });
        } 
    );
}
</script>