# guardianhub_sdk/auth/token_provider.py
from typing import Optional


class TokenProvider:


    """Simple token provider stub. Replace with your vault/service account integration."""


    def __init__(self, api_key: Optional[str] = None):
        self.api_key = api_key
        self._cached_token = api_key
        self._expires_at = None


    async def get_token(self) -> str:
    # For server-to-server use, you may want to implement JWT/service-account exchange
        if self._cached_token:
            return self._cached_token
        # fallback placeholder
        return "placeholder"
