code: @Override
      public ListUserTagsResult listUserTags(ListUserTagsRequest request) {
          request = beforeClientExecution(request);
          return executeListUserTags(request);
      }
docs: <p>
  Lists the tags that are attached to the specified user. The returned list of tags is sorted by tag key. For more
  information about tagging, see <a href="https://docs.aws.amazon.com/IAM/latest/UserGuide/id_tags.html">Tagging
  IAM Identities</a> in the <i>IAM User Guide</i>.
  </p>
  
  @param listUserTagsRequest
  @return Result of the ListUserTags operation returned by the service.
  @throws NoSuchEntityException
  The request was rejected because it referenced a resource entity that does not exist. The error message
  describes the resource.
  @throws ServiceFailureException
  The request processing has failed because of an unknown error, exception or failure.
  @sample AmazonIdentityManagement.ListUserTags
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/iam-2010-05-08/ListUserTags" target="_top">AWS API
  Documentation</a>