In DynamoDB, could you use IAM to grant access to Amazon DynamoDB resources and API actions?
Depended to the type of access
In DynamoDB there is no need to grant access
Amazon DynamoDB integrates with AWS Identity and Access Management (IAM). You can use AWS IAM to grant access
to Amazon DynamoDB resources and API actions. To do this, you first write an AWS IAM policy, which is a document
that explicitly lists the permissions you want to grant. You then attach that policy to an AWS IAM user or role.