langchain/llms/vertexai.py/_VertexAICommon/_try_init_vertexai
class _VertexAICommon:    def _try_init_vertexai(cls, values: Dict) -> None:
        allowed_params = ["project", "location", "credentials"]
        params = {k: v for k, v in values.items() if v in allowed_params}
        init_vertexai(**params)
        return None