Define Read and Write permissions in AWS SAM - AWS Serverless Application Model
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Define Read and Write permissions in AWS SAM

In AWS SAM, Read and Write permissions can be provisioned within a single connector:

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
...
Resources:
  MyFunction:
    Type: AWS::Lambda::Function
    Connectors:
      MyTableConn:
        Properties:
          Destination:
            Id: MyTable
          Permissions:
            - Read
            - Write
  MyTable:
    Type: AWS::DynamoDB::Table

For more information on using connectors, refer to AWS SAM connector reference.