# models/user.py from datetime import datetime from sqlalchemy import Column, Integer, String, DateTime from sqlalchemy.orm import relationship from zoneinfo import ZoneInfo from .base import Base class User(Base): __tablename__ = 'users' id = Column(Integer, primary_key=True) username = Column(String(100), unique=True, nullable=False) hashed_password = Column(String(255), nullable=False) created_at = Column(DateTime(timezone=True), default=lambda: datetime.now(ZoneInfo("Asia/Jakarta"))) # Relationship to Message messages = relationship("Message", back_populates="user", cascade="all, delete-orphan")