code: @Override
      public ListCertificateAuthoritiesResult listCertificateAuthorities(ListCertificateAuthoritiesRequest request) {
          request = beforeClientExecution(request);
          return executeListCertificateAuthorities(request);
      }
docs: <p>
  Lists the private certificate authorities that you created by using the <a>CreateCertificateAuthority</a>
  operation.
  </p>
  
  @param listCertificateAuthoritiesRequest
  @return Result of the ListCertificateAuthorities operation returned by the service.
  @throws InvalidNextTokenException
  The token specified in the <code>NextToken</code> argument is not valid. Use the token returned from your
  previous call to <a>ListCertificateAuthorities</a>.
  @sample AWSACMPCA.ListCertificateAuthorities
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/acm-pca-2017-08-22/ListCertificateAuthorities"
  target="_top">AWS API Documentation</a>