First, You must have google developer console project.
You can access at https://console.cloud.google.com/
Google Cloud Platform
하나의 계정으로 모든 Google 서비스를 Google Cloud Platform을 사용하려면 로그인하세요.
accounts.google.com
And You have to enable apis. (google drive, google spreadsheet)
Google Drive API : https://console.cloud.google.com/apis/library/drive.googleapis.com/
Google Cloud Platform
하나의 계정으로 모든 Google 서비스를 Google Cloud Platform을 사용하려면 로그인하세요.
accounts.google.com
Google Sheets API : https://console.cloud.google.com/apis/library/sheets.googleapis.com/
Google Cloud Platform
하나의 계정으로 모든 Google 서비스를 Google Cloud Platform을 사용하려면 로그인하세요.
accounts.google.com
Then, you have to consent screen configuration.
Then, you have to create service account credentials.
If you want to full access, Select Role to Project> Owner.
If you want to use this key directly with goose-db library, rename your key to "credentials.json".