def get_all(self) -> list:
        with open(self.json_file, "r") as f:
            return json.load(f)
    def create_new(self, record: dict) -> int:
        data = self.get_all()
        if len(data) == 0:
            next_id = 0
        else:
            next_id = max(data, key=lambda x: x["record_id"])["record_id"] + 1
        record["record_id"] = next_id
        data.append(record)
        self._write_to_file(data)
        return next_id