langchain/document_loaders/stripe.py/StripeLoader/__init__
class StripeLoader:    def __init__(self, resource: str, access_token: Optional[str] = None) -> None:
        self.resource = resource
        access_token = access_token or get_from_env(
            "access_token", "STRIPE_ACCESS_TOKEN"
        )
        self.headers = {"Authorization": f"Bearer {access_token}"}