ListUsersInOrg.groovy

#!/usr/bin/env groovy

package org.kohsuke.github

@Grab(group='org.kohsuke', module='github-api', version='1.75')
import org.kohsuke.github.GitHub

class ListUsersInOrg extends GitHub {

	static void main(args) {

		def cli = new CliBuilder(usage: 'groovy -t <personal access token> ListUsersInOrg.groovy <organization>')
		cli.t(longOpt: 'token', 'personal access token', required: false  , args: 1 )

		OptionAccessor opt = cli.parse(args)

		if(opt.arguments().size() != 1) {
			cli.usage()
			return
		}

		def org = opt.arguments()[0];
		def githubCom

		if (opt.t) {
			githubCom = GitHub.connectUsingOAuth(opt.t);
		} else {
			githubCom = GitHub.connect();
		}

		githubCom.getOrganization(org).listMembers().each {
			println it.getLogin();
		}
	}
}