langchain/client/langchain.py/LangChainPlusClient/_get_seeded_tenant_id
class LangChainPlusClient:    def _get_seeded_tenant_id(api_url: str, api_key: Optional[str]) -> str:
        """Get the tenant ID from the seeded tenant."""
        url = f"{api_url}/tenants"
        headers = {"x-api-key": api_key} if api_key else {}
        response = requests.get(url, headers=headers)
        try:
            raise_for_status_with_text(response)
        except Exception as e:
            raise ValueError(
                "Unable to get default tenant ID. Please manually provide."
            ) from e
        results: List[dict] = response.json()
        if len(results) == 0:
            raise ValueError("No seeded tenant found")
        return results[0]["id"]