如何在serverless.yml中将DynamoDB流引用为Lambda函数触发器事件？

service: my-service

provider:
  name: aws
  runtime: nodejs14.x
  region: us-east-1

functions:
  myFunction:
    handler: handler.myFunction
    events:
      - stream:
          type: dynamodb
          arn: arn:aws:dynamodb:us-east-1:123456789012:table/my-table/stream/2022-01-01T00:00:00.000

resources:
  Resources:
    myTable:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: my-table
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: N
        KeySchema:
          - AttributeName: id
            KeyType: HASH
        ProvisionedThroughput:
          ReadCapacityUnits: 5
          WriteCapacityUnits: 5