text: from sqlalchemy import *
  from sqlalchemy import create_engine, ForeignKey
  from sqlalchemy import Column, Date, Integer, String
  from sqlalchemy.ext.declarative import declarative_base
  from sqlalchemy.orm import relationship, backref
  
  engine = create_engine('sqlite:///webapp.db', echo=True)
  Base = declarative_base()
  
  class User(Base):
      __tablename__ = "users"
  
      id = Column(Integer, primary_key=True)
      username = Column(String)
      password = Column(String)
  
      def __init__(self, username, password):
          self.username = username
          self.password = password
  
  Base.metadata.create_all(engine)
  