regions.xml

<regions>
    <region displayname="AUTHENTICATION_SG_REGION" hostname="sg"
        allowedProductLocales="all" localesThatDefaultToThisRegion="enSG"/>
    <region displayname="AUTHENTICATION_US_REGION" hostname="us"
        allowedProductLocales="all" localesThatDefaultToThisRegion="enUS"/>
    <region displayname="AUTHENTICATION_EU_REGION" hostname="eu"
        allowedProductLocales="all" localesThatDefaultToThisRegion="enGB"/>
    <region displayname="AUTHENTICATION_KR_REGION" hostname="kr"
        allowedProductLocales="all" localesThatDefaultToThisRegion="koKR"/>
</regions>