Infrastructure as code for serverless app with AWS CDK (Cloud Development Kit) > Allow Lambda function to interact with DynamoDB

Allow Lambda function to interact with DynamoDB

Table of Content

To allow a Lambda function the permissions to interact with a DynamoDB table, you only needs a single line of code.

Add CDK code to grant Lambda function the permissions to interact with DynamoDB table

In the CDK stack file (cdk-workshop-stack.ts), inside the constructor and below code for UsersListHandler Lambda function, add the following code:
```
table.grantReadData(usersList);
```
Your code should looks like this:

[Optional] Run cdk diff to check the difference of your stack

Run cdk diff to see the change set
```
cdk diff
```

Run cdk deploy to deploy your CDK stack that grant Lambda function permissions

Run cdk deploy to deploy your CDK stack with the IAM permissions.
```
cdk deploy
```
Test the UsersListHandler Lambda function again, the function should be invoked succeeded with a 200 status.