Use ListAccessKeys with an Amazon SDK or command line tool

###############################################################################
# function errecho
#
# This function outputs everything sent to it to STDERR (standard error output).
###############################################################################
function errecho() {
  printf "%s\n" "$*" 1>&2
}

###############################################################################
# function iam_list_access_keys
#
# This function lists the access keys for the specified user.
#
# Parameters:
#       -u user_name -- The name of the IAM user.
#
# Returns:
#       access_key_ids
#     And:
#       0 - If successful.
#       1 - If it fails.
###############################################################################
function iam_list_access_keys() {

  # bashsupport disable=BP5008
  function usage() {
    echo "function iam_list_access_keys"
    echo "Lists the AWS Identity and Access Management (IAM) access key IDs for the specified user."
    echo "  -u user_name   The name of the IAM user."
    echo ""
  }

  local user_name response
  local option OPTARG # Required to use getopts command in a function.
  # Retrieve the calling parameters.
  while getopts "u:h" option; do
    case "${option}" in
      u) user_name="${OPTARG}" ;;
      h)
        usage
        return 0
        ;;
      \?)
        echo "Invalid parameter"
        usage
        return 1
        ;;
    esac
  done
  export OPTIND=1

  if [[ -z "$user_name" ]]; then
    errecho "ERROR: You must provide a username with the -u parameter."
    usage
    return 1
  fi

  response=$(aws iam list-access-keys \
    --user-name "$user_name" \
    --output text \
    --query 'AccessKeyMetadata[].AccessKeyId')

  local error_code=${?}

  if [[ $error_code -ne 0 ]]; then
    aws_cli_error_log $error_code
    errecho "ERROR: AWS reports list-access-keys operation failed.$response"
    return 1
  fi

  echo "$response"

  return 0
}

bool AwsDoc::IAM::listAccessKeys(const Aws::String &userName,
                                 const Aws::Client::ClientConfiguration &clientConfig) {
    Aws::IAM::IAMClient iam(clientConfig);
    Aws::IAM::Model::ListAccessKeysRequest request;
    request.SetUserName(userName);

    bool done = false;
    bool header = false;
    while (!done) {
        auto outcome = iam.ListAccessKeys(request);
        if (!outcome.IsSuccess()) {
            std::cerr << "Failed to list access keys for user " << userName
                      << ": " << outcome.GetError().GetMessage() << std::endl;
            return false;
        }

        if (!header) {
            std::cout << std::left << std::setw(32) << "UserName" <<
                      std::setw(30) << "KeyID" << std::setw(20) << "Status" <<
                      std::setw(20) << "CreateDate" << std::endl;
            header = true;
        }

        const auto &keys = outcome.GetResult().GetAccessKeyMetadata();
        const Aws::String DATE_FORMAT = "%Y-%m-%d";

        for (const auto &key: keys) {
            Aws::String statusString =
                    Aws::IAM::Model::StatusTypeMapper::GetNameForStatusType(
                            key.GetStatus());
            std::cout << std::left << std::setw(32) << key.GetUserName() <<
                      std::setw(30) << key.GetAccessKeyId() << std::setw(20) <<
                      statusString << std::setw(20) <<
                      key.GetCreateDate().ToGmtString(DATE_FORMAT.c_str()) << std::endl;
        }

        if (outcome.GetResult().GetIsTruncated()) {
            request.SetMarker(outcome.GetResult().GetMarker());
        }
        else {
            done = true;
        }
    }

    return true;
}

To list the access key IDs for an IAM user

The following list-access-keys command lists the access keys IDs for the IAM user named Bob.

aws iam list-access-keys \
    --user-name Bob

Output:

{
    "AccessKeyMetadata": [
        {
            "UserName": "Bob",
            "Status": "Active",
            "CreateDate": "2013-06-04T18:17:34Z",
            "AccessKeyId": "AKIAIOSFODNN7EXAMPLE"
        },
        {
            "UserName": "Bob",
            "Status": "Inactive",
            "CreateDate": "2013-06-06T20:42:26Z",
            "AccessKeyId": "AKIAI44QH8DHBEXAMPLE"
        }
    ]
}

You cannot list the secret access keys for IAM users. If the secret access keys are lost, you must create new access keys using the create-access-keys command.

For more information, see Managing access keys for IAM users in the Amazon IAM User Guide.

// UserWrapper encapsulates user actions used in the examples.
// It contains an IAM service client that is used to perform user actions.
type UserWrapper struct {
	IamClient *iam.Client
}



// ListAccessKeys lists the access keys for the specified user.
func (wrapper UserWrapper) ListAccessKeys(userName string) ([]types.AccessKeyMetadata, error) {
	var keys []types.AccessKeyMetadata
	result, err := wrapper.IamClient.ListAccessKeys(context.TODO(), &iam.ListAccessKeysInput{
		UserName: aws.String(userName),
	})
	if err != nil {
		log.Printf("Couldn't list access keys for user %v. Here's why: %v\n", userName, err)
	} else {
		keys = result.AccessKeyMetadata
	}
	return keys, err
}

import software.amazon.awssdk.services.iam.model.AccessKeyMetadata;
import software.amazon.awssdk.services.iam.model.IamException;
import software.amazon.awssdk.services.iam.model.ListAccessKeysRequest;
import software.amazon.awssdk.services.iam.model.ListAccessKeysResponse;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.iam.IamClient;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class ListAccessKeys {
    public static void main(String[] args) {
        final String usage = """

                Usage:
                    <userName>\s

                Where:
                    userName - The name of the user for which access keys are retrieved.\s
                """;

        if (args.length != 1) {
            System.out.println(usage);
            System.exit(1);
        }

        String userName = args[0];
        Region region = Region.AWS_GLOBAL;
        IamClient iam = IamClient.builder()
                .region(region)
                .build();

        listKeys(iam, userName);
        System.out.println("Done");
        iam.close();
    }

    public static void listKeys(IamClient iam, String userName) {
        try {
            boolean done = false;
            String newMarker = null;

            while (!done) {
                ListAccessKeysResponse response;

                if (newMarker == null) {
                    ListAccessKeysRequest request = ListAccessKeysRequest.builder()
                            .userName(userName)
                            .build();

                    response = iam.listAccessKeys(request);

                } else {
                    ListAccessKeysRequest request = ListAccessKeysRequest.builder()
                            .userName(userName)
                            .marker(newMarker)
                            .build();

                    response = iam.listAccessKeys(request);
                }

                for (AccessKeyMetadata metadata : response.accessKeyMetadata()) {
                    System.out.format("Retrieved access key %s", metadata.accessKeyId());
                }

                if (!response.isTruncated()) {
                    done = true;
                } else {
                    newMarker = response.marker();
                }
            }

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}

List the access keys.

import { ListAccessKeysCommand, IAMClient } from "@aws-sdk/client-iam";

const client = new IAMClient({});

/**
 * A generator function that handles paginated results.
 * The AWS SDK for JavaScript (v3) provides {@link https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/index.html#paginators | paginator} functions to simplify this.
 *
 * @param {string} userName
 */
export async function* listAccessKeys(userName) {
  const command = new ListAccessKeysCommand({
    MaxItems: 5,
    UserName: userName,
  });

  /**
   * @type {import("@aws-sdk/client-iam").ListAccessKeysCommandOutput | undefined}
   */
  let response = await client.send(command);

  while (response?.AccessKeyMetadata?.length) {
    for (const key of response.AccessKeyMetadata) {
      yield key;
    }

    if (response.IsTruncated) {
      response = await client.send(
        new ListAccessKeysCommand({
          Marker: response.Marker,
        }),
      );
    } else {
      break;
    }
  }
}

// Load the AWS SDK for Node.js
var AWS = require("aws-sdk");
// Set the region
AWS.config.update({ region: "REGION" });

// Create the IAM service object
var iam = new AWS.IAM({ apiVersion: "2010-05-08" });

var params = {
  MaxItems: 5,
  UserName: "IAM_USER_NAME",
};

iam.listAccessKeys(params, function (err, data) {
  if (err) {
    console.log("Error", err);
  } else {
    console.log("Success", data);
  }
});

suspend fun listKeys(userNameVal: String?) {

    val request = ListAccessKeysRequest {
        userName = userNameVal
    }
    IamClient { region = "AWS_GLOBAL" }.use { iamClient ->
        val response = iamClient.listAccessKeys(request)
        response.accessKeyMetadata?.forEach { md ->
            println("Retrieved access key ${md.accessKeyId}")
        }
    }
}

Example 1: This command lists the access keys for the IAM user named Bob. Note that you cannot list the secret access keys for IAM users. If the secret access keys are lost, you must create new access keys with the New-IAMAccessKey cmdlet.

Get-IAMAccessKey -UserName "Bob"

Output:

AccessKeyId                CreateDate                   Status              UserName
-----------                ----------                   ------              --------
AKIAIOSFODNN7EXAMPLE       12/3/2014 10:53:41 AM        Active              Bob
AKIAI44QH8DHBEXAMPLE       6/6/2013 8:42:26 PM          Inactive            Bob

def list_keys(user_name):
    """
    Lists the keys owned by the specified user.

    :param user_name: The name of the user.
    :return: The list of keys owned by the user.
    """
    try:
        keys = list(iam.User(user_name).access_keys.all())
        logger.info("Got %s access keys for %s.", len(keys), user_name)
    except ClientError:
        logger.exception("Couldn't get access keys for %s.", user_name)
        raise
    else:
        return keys

This example module lists, creates, deactivates, and deletes access keys.

# Manages access keys for IAM users
class AccessKeyManager
  def initialize(iam_client, logger: Logger.new($stdout))
    @iam_client = iam_client
    @logger = logger
    @logger.progname = "AccessKeyManager"
  end

  # Lists access keys for a user
  #
  # @param user_name [String] The name of the user.
  def list_access_keys(user_name)
    response = @iam_client.list_access_keys(user_name: user_name)
    if response.access_key_metadata.empty?
      @logger.info("No access keys found for user '#{user_name}'.")
    else
      response.access_key_metadata.map(&:access_key_id)
    end
  rescue Aws::IAM::Errors::NoSuchEntity => e
    @logger.error("Error listing access keys: cannot find user '#{user_name}'.")
    []
  rescue StandardError => e
    @logger.error("Error listing access keys: #{e.message}")
    []
  end

  # Creates an access key for a user
  #
  # @param user_name [String] The name of the user.
  # @return [Boolean]
  def create_access_key(user_name)
    response = @iam_client.create_access_key(user_name: user_name)
    access_key = response.access_key
    @logger.info("Access key created for user '#{user_name}': #{access_key.access_key_id}")
    access_key
  rescue Aws::IAM::Errors::LimitExceeded => e
    @logger.error("Error creating access key: limit exceeded. Cannot create more.")
    nil
  rescue StandardError => e
    @logger.error("Error creating access key: #{e.message}")
    nil
  end

  # Deactivates an access key
  #
  # @param user_name [String] The name of the user.
  # @param access_key_id [String] The ID for the access key.
  # @return [Boolean]
  def deactivate_access_key(user_name, access_key_id)
    @iam_client.update_access_key(
      user_name: user_name,
      access_key_id: access_key_id,
      status: "Inactive"
    )
    true
  rescue StandardError => e
    @logger.error("Error deactivating access key: #{e.message}")
    false
  end

  # Deletes an access key
  #
  # @param user_name [String] The name of the user.
  # @param access_key_id [String] The ID for the access key.
  # @return [Boolean]
  def delete_access_key(user_name, access_key_id)
    @iam_client.delete_access_key(
      user_name: user_name,
      access_key_id: access_key_id
    )
    true
  rescue StandardError => e
    @logger.error("Error deleting access key: #{e.message}")
    false
  end
end