upstage_api_key: SecretStr = Field(
default_factory=secret_from_env('UPSTAGE_API_KEY', error_message='You must specify an api key. You can pass it an argument as `api_key=...` or set the environment variable `UPSTAGE_API_KEY`.'),
alias='api_key'Automatically inferred from env are UPSTAGE_API_KEY if not provided.