// Define custom options
var options = {
  // Dry run is a special option that allows us to perform
  // a test run without actually copying the labels.
  dryRun: true
};

// Instantiate with custom options
var copyGitHubLabels = require('copy-github-labels')(options);

// Use basic auth
copyGitHubLabels.authenticate({
  type: "basic",
  username: "[USERNAME]",
  password: "[PASSWORD]"
});

// Define source and destination
var source = '[SOURCE_REPO]';
var destination = '[DESTINATION_REPO]';

// Copy labels from one repository to another
// The callback is called for every label but no actual
// copy operation is performed, so the destination repository is not updated.
copyGitHubLabels.copy(source, destination, function (err, label) {

  // Log errors
  if (err) {
    return console.log('Could not copy label: ' + JSON.stringify(err));
  }

  // Log copies
  console.log('Label copied successfully: ' + JSON.stringify(label))
});