AWS SAMでslackに利用料金の通知をさせたい

❯ sam init     

        SAM CLI now collects telemetry to better understand customer needs.

        You can OPT OUT and disable telemetry collection by setting the
        environment variable SAM_CLI_TELEMETRY=0 in your shell.
        Thanks for your help!

        Learn More: https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-telemetry.html

Which template source would you like to use?
        1 - AWS Quick Start Templates
        2 - Custom Template Location
Choice: 1
What package type would you like to use?
        1 - Zip (artifact is a zip uploaded to S3)
        2 - Image (artifact is an image uploaded to an ECR image repository)
Package type: 1

Which runtime would you like to use?
        1 - nodejs12.x
        2 - python3.8
        3 - ruby2.7
        4 - go1.x
        5 - java11
        6 - dotnetcore3.1
        7 - nodejs10.x
        8 - python3.7
        9 - python3.6
        10 - python2.7
        11 - ruby2.5
        12 - java8.al2
        13 - java8
        14 - dotnetcore2.1
Runtime: 1

Project name [sam-app]: sam-example

Cloning app templates from https://github.com/aws/aws-sam-cli-app-templates

AWS quick start application templates:
        1 - Hello World Example
        2 - Step Functions Sample App (Stock Trader)
        3 - Quick Start: From Scratch
        4 - Quick Start: Scheduled Events
        5 - Quick Start: S3
        6 - Quick Start: SNS
        7 - Quick Start: SQS
        8 - Quick Start: Web Backend
Template selection: 1

    -----------------------
    Generating application:
    -----------------------
    Name: sam-example
    Runtime: nodejs12.x
    Dependency Manager: npm
    Application Template: hello-world
    Output Directory: .
    
    Next steps can be found in the README file at ./sam-example/README.md

❯ sam local start-api
❯ curl http://127.0.0.1:3000/hello
{"message":"hello world"}