old_contents: # -*- coding: utf-8 -*-
  
  import sys
  from sqlalchemy import create_engine
  from sqlalchemy import Column, Integer, String
  from sqlalchemy.ext.declarative import declarative_base
  
  # Local
  #SQLALCHEMY_DATABASE_URI = 'sqlite:///accounts.db'
  
  # Heroku
  SQLALCHEMY_DATABASE_URI = os.environ['DATABASE_URL']
  
  Base = declarative_base()
  
  
  def db_connect():
      """
      Performs database connection using database settings from settings.py.
      Returns sqlalchemy engine instance
      """
      return create_engine(SQLALCHEMY_DATABASE_URI)
  
  
  class User(Base):
      __tablename__ = "user"
  
      id = Column(Integer, primary_key=True)
      username = Column(String(30), unique=True)
      password = Column(String(512))
      email = Column(String(50))
  
      def __repr__(self):
          return '<User %r>' % self.username
  
  
  engine = db_connect()  # Connect to database
  Base.metadata.create_all(engine)  # Create models
  
new_contents: # -*- coding: utf-8 -*-
  
  import sys
  import os
  from sqlalchemy import create_engine
  from sqlalchemy import Column, Integer, String
  from sqlalchemy.ext.declarative import declarative_base
  
  # Local
  #SQLALCHEMY_DATABASE_URI = 'sqlite:///accounts.db'
  
  # Heroku
  SQLALCHEMY_DATABASE_URI = os.environ['DATABASE_URL']
  
  Base = declarative_base()
  
  
  def db_connect():
      """
      Performs database connection using database settings from settings.py.
      Returns sqlalchemy engine instance
      """
      return create_engine(SQLALCHEMY_DATABASE_URI)
  
  
  class User(Base):
      __tablename__ = "user"
  
      id = Column(Integer, primary_key=True)
      username = Column(String(30), unique=True)
      password = Column(String(512))
      email = Column(String(50))
  
      def __repr__(self):
          return '<User %r>' % self.username
  
  
  engine = db_connect()  # Connect to database
  Base.metadata.create_all(engine)  # Create models
  
subject: Update tabledef.py