sqlalchemy uuid column 설정방법

from sqlalchemy.orm import relationship
from sqlalchemy import Column, Integer, String, Text, DateTime, Boolean
from app.db.engine import Base
from sqlalchemy.sql import func
from uuid import UUID, uuid4

class User(Base):
    __tablename__ = "user"
    id = Column(String(30), primary_key=True, default=str(uuid4()))

이래야 해당 키값을 생성할 때, uuid String 으로 적용된다.