//snippet-sourcedescription:[DeleteUserPool.java demonstrates how to delete an existing user pool.]
//snippet-keyword:[Java]
//snippet-sourcesyntax:[java]
//snippet-keyword:[Code Sample]
//snippet-keyword:[Amazon Cognito]
//snippet-service:[cognito]
//snippet-sourcetype:[full-example]
//snippet-sourcedate:[4/16/2020]
//snippet-sourceauthor:[scmacdon - AWS]
/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */
package com.example.cognito;

//snippet-start:[cognito.java2.DeleteUserPool.import]
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.cognitoidentityprovider.CognitoIdentityProviderClient;
import software.amazon.awssdk.services.cognitoidentityprovider.model.CognitoIdentityProviderException;
import software.amazon.awssdk.services.cognitoidentityprovider.model.DeleteUserPoolRequest;
import software.amazon.awssdk.services.cognitoidentityprovider.model.DeleteUserPoolResponse;
//snippet-end:[cognito.java2.DeleteUserPool.import]

public class DeleteUserPool {

    public static void main(String[] args) {
        final String USAGE = "\n" +
                "Usage:\n" +
                "    DeleteUserPool <userPoolId> \n\n" +
                "Where:\n" +
                "    userPoolId - the ID given to your user pool when created\n\n" +
                "Example:\n" +
                "    DeleteUserPool us-east-2_P0oL1D\n";

        if (args.length < 1) {
             System.out.println(USAGE);
             System.exit(1);
         }

        String userPoolId = args[0];

        CognitoIdentityProviderClient cognitoclient = CognitoIdentityProviderClient.builder()
                .region(Region.US_EAST_1)
                .build();
        deletePool(cognitoclient, userPoolId );
    }

    //snippet-start:[cognito.java2.DeleteUserPool.main]
    public static void deletePool(CognitoIdentityProviderClient cognitoclient, String userPoolId ) {

        try {
             DeleteUserPoolRequest request = DeleteUserPoolRequest.builder()
                .userPoolId(userPoolId)
                .build();

            DeleteUserPoolResponse response = cognitoclient.deleteUserPool(request);
            System.out.println("User Pool " + response.toString() + " deleted. ID: " + request.userPoolId());

        } catch (CognitoIdentityProviderException e){
        e.getStackTrace();
    }
        //snippet-end:[cognito.java2.DeleteUserPool.main]
    }
}

@@ -2838,24 +2838,93 @@
     
-e.getStackTrace(
+    System.err.println(e.awsErrorDetails().errorMessage());%0A            System.exit(1
 );%0A 

Update DeleteUserPool.java