google-contacts-crud/example/key.json

Description ===========

{
  "client":{
    "id":"your client id",
    "secret":"your client secret"
  },
  "credentials":{
    "access_token": "your access_token",
    "token_type": "Bearer",
    "expires_in": 3600,
    "refresh_token": "your refresh_token"
  }
}