fix: use DefaultCredentialsProvider for AWS environments instead of ProfileCredentialsProvider

Author: mama-samba-braima

src/main/java/com/amigoscode/config/AwsS3Config.java

@@ -4,6 +4,7 @@
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import software.amazon.awssdk.auth.credentials.AwsBasicCredentials;
+import software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider;
 import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
 import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
 import software.amazon.awssdk.regions.Region;
@@ -43,12 +44,13 @@ public S3Client s3Client() {
                         .pathStyleAccessEnabled(pathStyleEnabled)
                         .build());
 
-        // Use MinIO credentials for local development, AWS profile for other environments
+        // Use MinIO credentials for local development, default credentials chain for AWS
         if ("local".equals(activeProfile)) {
             builder = builder.credentialsProvider(StaticCredentialsProvider.create(
                     AwsBasicCredentials.create(accessKeyId, secretAccessKey)));
         } else {
-            builder = builder.credentialsProvider(ProfileCredentialsProvider.create());
+            // Use default credentials provider chain (IAM roles, env vars, profiles, etc.)
+            builder = builder.credentialsProvider(DefaultCredentialsProvider.create());
         }
 
         if (StringUtils.isNotBlank(endpointOverride)) {