Why is the value not being added to the SQL table?

Question

Python

Here is the code that calls the function

from flask import Flask
from flask import render_template


from data import db_session

db_session.global_init("C:/Users/Tim/flask-sqlalchemy/db/blogs.sqlite")

app = Flask(__name__)
app.config['SECRET_KEY'] = 'yandexlyceum_secret_key'
db_session.global_init("db/blogs.sqlite")

def main():
    app.run()


if __name__ == '__main__':
    main()

import datetime
import sqlalchemy
from sqlalchemy import orm

from . import db_session
from .db_session import SqlAlchemyBase

class User(SqlAlchemyBase):
    __tablename__ = 'users'


    id = sqlalchemy.Column(sqlalchemy.Integer,
                           primary_key=True, autoincrement=True)
    name = sqlalchemy.Column(sqlalchemy.String, nullable=True)
    about = sqlalchemy.Column(sqlalchemy.String, nullable=True)
    email = sqlalchemy.Column(sqlalchemy.String,
                              index=True, unique=True, nullable=True)
    hashed_password = sqlalchemy.Column(sqlalchemy.String, nullable=True)
    created_date = sqlalchemy.Column(sqlalchemy.DateTime,
                                     default=datetime.datetime.now)
вот это как раз должно добовлять в таблицу значения но не добовляет
user = User()
user.name = "Пользователь 1"
user.about = "биография пользователя 1"
user.email = "[email protected]"
session = db_session.create_session()
session.add(user)
session.commit()

class News(SqlAlchemyBase):
    __tablename__ = 'news'

    id = sqlalchemy.Column(sqlalchemy.Integer,
                           primary_key=True, autoincrement=True)
    title = sqlalchemy.Column(sqlalchemy.String, nullable=True)
    content = sqlalchemy.Column(sqlalchemy.String, nullable=True)
    created_date = sqlalchemy.Column(sqlalchemy.DateTime,
                                     default=datetime.datetime.now)
    is_private = sqlalchemy.Column(sqlalchemy.Boolean, default=True)

    user_id = sqlalchemy.Column(sqlalchemy.Integer,
                                sqlalchemy.ForeignKey("news.id"))
    user = orm.relation('User')

    news = orm.relation("News", back_populates='user')

это другой код 
import sqlalchemy as sa
import sqlalchemy.orm as orm
from sqlalchemy.orm import Session
import sqlalchemy.ext.declarative as dec

SqlAlchemyBase = dec.declarative_base()

__factory = None
def global_init(db_file):
    global __factory

    if __factory:
        return

    if not db_file or not db_file.strip():
        raise Exception("blogs.sqlite")

    conn_str = f'sqlite:///{db_file.strip()}?check_same_thread=False'
    print(f"Подключение к базе данных по адресу {conn_str}")

    engine = sa.create_engine(conn_str, echo=False)
    __factory = orm.sessionmaker(bind=engine)



    from . import __all_models

    SqlAlchemyBase.metadata.create_all(engine)
def create_session() -> Session:
    global __factory
    return __factory()