text: # -*- coding: utf-8 -*-
  
  # from sqlalchemy import Column, BigInteger, String, Sequence, TIMESTAMP, ForeignKey
  from sqlalchemy import Column, BigInteger, String, TIMESTAMP, ForeignKey
  
  from db_manager import Base
  
  class User(Base):
  	__tablename__ = 'users'
  	id = Column(BigInteger, primary_key=True)
  	user = Column(String(512), nullable=False, unique=True)
  	role_id = Column(String(100), ForeignKey('roles.id'), nullable=False)
  
  	created_at = Column(TIMESTAMP, nullable=False)
  	created_by = Column(String(512), nullable=False)
  	updated_at = Column(TIMESTAMP, default=None)
  	updated_by = Column(String(512), nullable=False, default="")
  