"""Validator for API"""

class ValidatorAPI:
    def __init__(self):
        self._api_keys = {}
        self._valid_apis = ['GET_USER', 'POST_DATA']

    def register_api_key(self, api_key: str) -> bool:
        if len(api_key) != 32 or not set(api_key).issubset('0123456789abcdef'):
            return False
        self._api_keys[api_key] = True
        return True

    def unregister_api_key(self, api_key: str) -> bool:
        if api_key in self._api_keys:
            del self._api_keys[api_key]
            return True
        return False

    def validate_request