From 7b66ae649faf9761013d02c7fa607aa6fc586ba6 Mon Sep 17 00:00:00 2001
From: Clare Liguori <liguori@amazon.com>
Date: Wed, 18 Mar 2020 13:18:57 -0700
Subject: [PATCH] fix: let the AWS SDK determine the STS regional endpoint

---
 index.js | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/index.js b/index.js
index 3efaab2fe..09abb26c6 100644
--- a/index.js
+++ b/index.js
@@ -1,7 +1,6 @@
 const core = require('@actions/core');
 const aws = require('aws-sdk');
 const assert = require('assert');
-const util = require('util');
 
 // The max time that a GitHub action is allowed to run is 6 hours.
 // That seems like a reasonable default to use if no role duration is defined.
@@ -131,10 +130,9 @@ async function exportAccountId(maskAccountId, region) {
 }
 
 function getStsClient(region) {
-  const endpoint = util.format('https://sts.%s.amazonaws.com', region);
   return new aws.STS({
     region,
-    endpoint,
+    stsRegionalEndpoints: 'regional',
     customUserAgent: USER_AGENT
   });
 }