~/.aws/credentials

[default]
aws_access_key_id = { AWS Access Key ID }
aws_secret_access_key = { AWS Secret Access Key }

To get the access key id and secret access key of AWS
please follow the instrustions.
https://aws.amazon.com/jp/premiumsupport/knowledge-center/create-access-key/

Note that the IAM need these access rights.

• s3:PutObject
• s3:GetObject

./mylinebot/client_secrets.json

{
  "web": {
    "client_id": "XXXXX.apps.googleusercontent.com",
    "project_id": "XXXXX",
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://oauth2.googleapis.com/token",
    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
    "client_secret": "XXXXX",
    "redirect_uris": [
      "https://your_bucket_name.s3.ap-northeast-1.amazonaws.com/callback.html"
    ]
  }
}

Please refer to the following sites to get the client_secrets.json
https://qiita.com/Tomonobu3110/items/24c4e256498e1c4de922
Note that you need to make S3 bucket on AWS to fix the redirect_uris.

./mylinebot/.line_credentials

CHANNEL_SECRET={ Channel Secret }
CHANNEL_ACCESS_TOKEN={ Channel Access Token }

Please follow the instructions as below to get the channel access token of LINE service.
https://developers.line.biz/ja/docs/messaging-api/getting-started/
https://developers.line.biz/ja/docs/messaging-api/channel-access-tokens/#long-lived-channel-access-tokens

Sidecar uses the ngrok service to publish its node.js server to the internet world by https protocol.
ngrok service is free to use, but you need to register an account to use the service for unlimited time.
Please see the following URL for details.
https://ngrok.com/