code: public SecretResponse getSecret(String apiKey, String secretId) throws IOException, NexmoClientException {
          return getSecret(new SecretRequest(apiKey, secretId));
      }
docs: Get information for a specific secret id associated to a given API key.
  
  @param apiKey   The API key that the secret is associated to.
  @param secretId The id of the secret to get information on.
  
  @return SecretResponse object which contains the results from the API.
  
  @throws IOException          if a network error occurred contacting the Nexmo Account API
  @throws NexmoClientException if there was a problem wit hthe Nexmo request or response object indicating that the request was unsuccessful.