Source of file MemberExtension.php

<?php

namespace QuinnInteractive\Seo\Extensions;

use SilverStripe\Forms\FieldList;

use SilverStripe\Forms\TextField;

use SilverStripe\ORM\DataExtension;

/**

 * Class MemberExtension

 * @package QuinnInteractive\Seo\Extensions

 *

 * @property string TwitterAccountName

 */

class MemberExtension extends DataExtension

{

    private static $db = [

        'TwitterAccountName' => 'Varchar(80)'

    ];

    /**

     * @param FieldList $fields

     */

    public function updateCMSFields(FieldList $fields)

    {

        parent::updateCMSFields($fields); // TODO: Change the autogenerated stub

        $fields->addFieldsToTab('Root.Main', [

            TextField::create('TwitterAccountName')

        ], 'Password');

    }

}