the readme is incorrect

[repoman1964]

this looks like an environment variable...

_Configure authentication with service account like following:

For example,

GDRIVE_SERVICE_ACCOUNT_CREDENTIALS_JSON = '{ "type": "service_account", "project_id": "project_id here", "private_key_id": "private_key_id here", "private_key": "private_key here", "client_email": "client_email here", "client_id": "client_id here", "auth_uri": "auth_uri here", "token_uri": "token_uri here", "auth_provider_x509_cert_url": "auth_provider_x509_cert_url here", "client_x509_cert_url": "client_x509_cert_url here" }'_

this is what gdrive_exporter.py is looking for...

@classmethod
   def from_crawler(cls, crawler, uri, *, feed_options=None):
       return cls(
           uri,
           crawler.settings.get("**GDRIVE_SERVICE_ACCOUNT_CREDENTIALS**"),
           feed_options=feed_options,
       )