fix: Accomodate server to use IAM Roles

src/S3/s3.ts

@@ -5,9 +5,9 @@ import { env, utils, Log } from 'decentraland-commons'
 
 const ACCESS_KEY = env.get('AWS_ACCESS_KEY', '')
 const ACCESS_SECRET = env.get('AWS_ACCESS_SECRET', '')
-if (!ACCESS_KEY || !ACCESS_SECRET) {
+if ((ACCESS_KEY && !ACCESS_SECRET) || (!ACCESS_KEY && ACCESS_SECRET)) {
   throw new Error(
-    'You need to add an AWS key and secret to your env file. Check the .env.example file'
+    'The ACCESS_KEY and ACCESS_SECRET credentials must be provided at the same time.'
   )
 }
 
@@ -36,9 +36,14 @@ export type ACLValues = typeof ACL[keyof typeof ACL]
 
 const log = new Log('s3')
 
-let config: AWS.S3.ClientConfiguration = {
-  accessKeyId: ACCESS_KEY,
-  secretAccessKey: ACCESS_SECRET,
+let config: AWS.S3.ClientConfiguration = {}
+
+if (ACCESS_KEY && ACCESS_SECRET) {
+  config = {
+    ...config,
+    accessKeyId: ACCESS_KEY,
+    secretAccessKey: ACCESS_SECRET,
+  }
 }
 
 if (STORAGE_URL) {