text: from sqlalchemy import Column, Integer, String, DateTime
  from database import Base
  import datetime
  
  class User(Base):
      __tablename__ = 'users'
      id = Column(Integer, primary_key=True)
      username = Column(String(30), unique=True, nullable=False)
      password = Column(String(256), nullable=False)
      pin = Column(Integer, nullable=False)
      image = Column(String(256), nullable=False)
      created_at = Column(DateTime, default=datetime.datetime.utcnow)
  
      def __repr__(self):
          return '<User %r>' % self.username
  
      def __init__(self, username, password, pin, image_path):
          self.username = username
          self.password = password
          self.pin = pin
          self.image = image_path