text: 
  export default function({tr, formatter}){
    return [
      {
        property: 'id',
        header: {
          label: tr.t('Id')
        }
      }, {
        property: 'username',
        header: {
          label: tr.t("Username")
        }
      }, {
        property: 'firstName',
        header: {
          label: tr.t('First Name')
        }
      }, {
        property: 'createdAt',
        header: {
          label: tr.t('Created At')
        },
        cell: {
          formatters:[date => formatter.dateTime(date)]
        }
      }, {
        property: 'updatedAt',
        header: {
          label: tr.t("Updated At")
        },
        cell: {
          formatters:[date => formatter.dateTime(date)]
        }
      }
    ];
  }