Fix IAM Access for API REST

I'm in need of a skilled developer who can troubleshoot and fix connection problems related to IAM access in my API REST setup. I've already implemented some features, but I'm facing issues with authentication errors and connection failures.

Key Tasks:
- Diagnose the root cause of the "Missing Authentication Token" messages
- Ensure proper linking of API Gateway and DynamoDB
- Fix IAM access issues

Ideal Skills:
- Extensive experience with AWS services, particularly API Gateway and DynamoDB
- Strong knowledge of IAM roles and permissions
- Proficient in troubleshooting API connection problems
- Expertise in RESTful API development