Open the AWS Lambda functions management console
Click update-user function.
Open the Test tab.
In the Test event section,
Event name: Fill in update-user-event
Event JSON: Replace the placeholder event with id of user with Nguyen Van An name but with new email and name.
{
"id": "18d35ef6-a7ae-415b-a97d-34dc069a840d",
"email": "nguyenvananh@gmail.com",
"name": "Nguyen Van Anh"
}
Replace the user id with yours, you can get it in the DynamoDB Explorer items or in the response after invoking list-users.
Click Save
Click the Test button.

Verify that the user is updated.
Open the Explore items page of the DynamoDB management console.
Click refresh.
Verify that:
Nguyen Van An is updated to Nguyen Van Anhnguyenvanan@gmail.com is updated to nguyenvananh@gmail.com