old_contents: from app_factory import db
  from db.models.Session import Session
  
  
  class User(db.Model):
      __tablename__ = 'users'
      id = db.Column(db.Integer, primary_key=True)
      name = db.Column('name', db.String(50))
      username = db.Column('username', db.String(50))
      password = db.Column('password', db.String(50))
      email = db.Column('email', db.String(128))
  
      session = db.relationship(
          Session, uselist=False, backref=db.backref('user', order_by=id)
      )
  
      def __repr__(self):
          return ''
          '<User(name={name}, username={username}, '
          'password={password}, email={email})>'.format(
              name=self.name, username=self.username,
              password=self.password, email=self.email
          )
  
new_contents: from app_factory import db
  from db.models.Session import Session
  
  
  class User(db.Model):
      __tablename__ = 'users'
      id = db.Column(db.Integer, primary_key=True)
      name = db.Column('name', db.String(50))
      username = db.Column('username', db.String(50))
      password = db.Column('password', db.String(50))
      email = db.Column('email', db.String(128))
  
      session = db.relationship(
          Session, uselist=False, backref=db.backref('user', order_by=id)
      )
  
      def __repr__(self):
          return ''
          '<User(name={name}, username={username}, '
          'password={password}, email={email})>'.format(
              name=self.name, username=self.username,
              password=self.password, email=self.email
          )
  
      def __init__(self, name, username, password, email):
          self.name = name
          self.username = username
          self.password = password
          self.email = email
  
subject: Add constructor