code: @Override
      public ResendValidationEmailResult resendValidationEmail(ResendValidationEmailRequest request) {
          request = beforeClientExecution(request);
          return executeResendValidationEmail(request);
      }
docs: <p>
  Resends the email that requests domain ownership validation. The domain owner or an authorized representative
  must approve the ACM certificate before it can be issued. The certificate can be approved by clicking a link in
  the mail to navigate to the Amazon certificate approval website and then clicking <b>I Approve</b>. However, the
  validation email can be blocked by spam filters. Therefore, if you do not receive the original mail, you can
  request that the mail be resent within 72 hours of requesting the ACM certificate. If more than 72 hours have
  elapsed since your original request or since your last attempt to resend validation mail, you must request a new
  certificate. For more information about setting up your contact email addresses, see <a
  href="https://docs.aws.amazon.com/acm/latest/userguide/setup-email.html">Configure Email for your Domain</a>.
  </p>
  
  @param resendValidationEmailRequest
  @return Result of the ResendValidationEmail operation returned by the service.
  @throws ResourceNotFoundException
  The specified certificate cannot be found in the caller's account or the caller's account cannot be
  found.
  @throws InvalidStateException
  Processing has reached an invalid state.
  @throws InvalidArnException
  The requested Amazon Resource Name (ARN) does not refer to an existing resource.
  @throws InvalidDomainValidationOptionsException
  One or more values in the <a>DomainValidationOption</a> structure is incorrect.
  @sample AWSCertificateManager.ResendValidationEmail
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/acm-2015-12-08/ResendValidationEmail" target="_top">AWS API
  Documentation</a>