NoSQL Workbench for Amazon DynamoDB adds support for AWS Identity and Access Management (IAM) roles and temporary security credentials
NoSQL Workbench for Amazon DynamoDB is a client-side application that helps developers build scalable, high-performance data models, and simplifies query development and testing. Starting today, you can use AWS Identity and Access Management (IAM) roles and temporary security credentials to grant users in your AWS account access to your DynamoDB resources from NoSQL Workbench. Previously, you could use only long-term AWS credentials (IAM user access key IDs and secret access keys) with NoSQL Workbench.
Source:: Amazon AWS