fix(s3stream): Set DefaultCredentialsProvider as fallback

- #2026
Set DefaultCredentialsProvider as AwsObjectStorage fallback credentials provider

Author: TwoOnefour

s3stream/src/main/java/com/automq/stream/s3/operator/AwsObjectStorage.java

@@ -44,6 +44,7 @@
 import software.amazon.awssdk.auth.credentials.AwsCredentialsProviderChain;
 import software.amazon.awssdk.auth.credentials.InstanceProfileCredentialsProvider;
 import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
+import software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider;
 import software.amazon.awssdk.awscore.AwsRequestOverrideConfiguration;
 import software.amazon.awssdk.core.async.AsyncRequestBody;
 import software.amazon.awssdk.core.async.AsyncResponseTransformer;
@@ -89,6 +90,7 @@ public class AwsObjectStorage extends AbstractObjectStorage {
     public static final String AUTH_TYPE_KEY = "authType";
     public static final String STATIC_AUTH_TYPE = "static";
     public static final String INSTANCE_AUTH_TYPE = "instance";
+    public static final String DEFAULT_AUTH_TYPE = "default";
     public static final String CHECKSUM_ALGORITHM_KEY = "checksumAlgorithm";
 
     // https://docs.aws.amazon.com/AmazonS3/latest/API/API_DeleteObjects.html
@@ -382,6 +384,9 @@ protected List<AwsCredentialsProvider> credentialsProviders() {
             case INSTANCE_AUTH_TYPE: {
                 return List.of(instanceProfileCredentialsProvider());
             }
+            case DEFAULT_AUTH_TYPE: {
+                return List.of(DefaultCredentialsProvider.create());
+            }
             default:
                 throw new UnsupportedOperationException("Unsupported auth type: " + authType);
         }
@@ -435,7 +440,7 @@ protected ClientOverrideConfiguration clientOverrideConfiguration() {
     private AwsCredentialsProvider newCredentialsProviderChain(List<AwsCredentialsProvider> credentialsProviders) {
         List<AwsCredentialsProvider> providers = new ArrayList<>(credentialsProviders);
         // Add default providers to the end of the chain
-        providers.add(InstanceProfileCredentialsProvider.create());
+        providers.add(DefaultCredentialsProvider.create());
         providers.add(AnonymousCredentialsProvider.create());
         return AwsCredentialsProviderChain.builder()
             .reuseLastProviderEnabled(true)