# Google IAM
- https://console.cloud.google.com/

## Auth options
- API key - only identifies your application, provides read-only access
- 서비스 계정 Service Account - connects as a specific "bot" user
- OAuth - connect on behalf of a specific user

## ref
- Getting Started Authentication
  - https://theoephraim.github.io/node-google-spreadsheet/#/getting-started/authentication