add troubleshooting section for s3 remote

Author: giograno

content/en/applications/serverless-rds-proxy-with-api-gateway-lambda-and-aurora-rds/index.md

@@ -1,6 +1,6 @@
 ---
 title: "Serverless RDS Proxy with API Gateway, Lambda, and Aurora RDS"
-description: "Serverless RDS Proxy demonstrates how Aurora cluster can be accessed with and without using a proxy."
+description: "Serverless RDS Proxy demonstrates how Aurora cluster can be accessed with and without using a proxy, deployed using Serverless Application Model on LocalStack"
 hide_feedback: true
 hide_readingtime: true
 type: applications

content/en/user-guide/state-management/cloud-pods/index.md

@@ -437,6 +437,30 @@ Full S3 remotes support is available in the CLI from version 3.2.0.
 If you experience any difficulties, update your [LocalStack CLI]({{< ref "/getting-started/installation/#updating" >}}).
 {{< /callout >}}
 
+#### Troubleshooting
+
+You might encounter an error like the following:
+
+{{< command >}}
+An error occurred (InvalidAccessKeyId) when calling the CreateBucket operation: The AWS Access Key Id you provided does not exist in our records.
+{{< / command >}}
+
+This means that you are likely using temporary AWS credentials and the the S3 remote configuration is missing the `AWS_SESSION_TOKEN` environment variable.
+To fix the issue, first export `AWS_SESSION_TOKEN` into your environment.
+Then, be sure to add the `access_token` placeholder to the URL of the `pod remote add` command:
+
+{{< command >}}
+$ localstack pod remote add s3-storage-aws 's3://ls-pods-bucket-test/?access_key_id={access_key_id}&secret_access_key={secret_access_key}&access_token={access_token}'
+{{< / command >}}
+
+If you are experiencing issues connecting to the S3 bucket, you might need to add the S3 URL to the list of URLs that it resolved upstream, e.g.,:
+
+```bash
+DNS_NAME_PATTERNS_TO_RESOLVE_UPSTREAM=ls-pods-bucket-test.s3.amazonaws.com/
+```
+
+For more info, browse the [Skip LocalStack DNS Resolution]({{< ref "/user-guide/tools/dns-server/#skip-localstack-dns-resolution" >}}) section of our docs.
+
 ### ORAS remote storage
 
 The ORAS remote enables users to store Cloud Pods in OCI-compatible registries like Docker Hub, Nexus, or ECS registries.