code: @Override
      public AcceptCertificateTransferResult acceptCertificateTransfer(AcceptCertificateTransferRequest request) {
          request = beforeClientExecution(request);
          return executeAcceptCertificateTransfer(request);
      }
docs: <p>
  Accepts a pending certificate transfer. The default state of the certificate is INACTIVE.
  </p>
  <p>
  To check for pending certificate transfers, call <a>ListCertificates</a> to enumerate your certificates.
  </p>
  
  @param acceptCertificateTransferRequest
  The input for the AcceptCertificateTransfer operation.
  @return Result of the AcceptCertificateTransfer operation returned by the service.
  @throws ResourceNotFoundException
  The specified resource does not exist.
  @throws TransferAlreadyCompletedException
  You can't revert the certificate transfer because the transfer is already complete.
  @throws InvalidRequestException
  The request is not valid.
  @throws ThrottlingException
  The rate exceeds the limit.
  @throws UnauthorizedException
  You are not authorized to perform this operation.
  @throws ServiceUnavailableException
  The service is temporarily unavailable.
  @throws InternalFailureException
  An unexpected error has occurred.
  @sample AWSIot.AcceptCertificateTransfer