I am trying to setup a database just like in a tutorial but I am getting a programming error that a table doesn't exist when I'm trying to add a `User`

This is the file that errors (`database.py`):

```
from sqlalchemy import create_engine, MetaData
from sqlalchemy.orm import scoped_session, sessionmaker
from sqlalchemy.ext.declarative import declarative_base

engine = create_engine(
    "mysql+pymysql://testuser:testpassword@localhost/test?charset=utf8",
    connect_args = {
        "port": 3306
    },
    echo="debug",
    echo_pool=True
)

db_session = scoped_session(
    sessionmaker(
        bind=engine,
        autocommit=False,
        autoflush=False
    )
)

Base = declarative_base()

def init_db():
    import models
    Base.metadata.create_all(bind=engine)

    from models import User
    db_session.add(
        User(username="testuser", password_hash=b"", password_salt=b"", balance=1)
    )
    db_session.commit()

    print("Initialized the db")

if __name__ == "__main__":
    init_db()

```

To init the database (create the tables) I just run the file.
It errors when it creates the test user.

Here is `models.py`:

```
from sqlalchemy import Column, Integer, Numeric, Binary, String
from sqlalchemy.orm import relationship

from database import Base

class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True)

    username = Column(String(16), unique=True)
    password_hash = Column(Binary(32))
    password_salt = Column(Binary(32))

    balance = Column(Numeric(precision=65, scale=8))

    def __repr__(self):
        return "<User(balance={})>".format(balance)

```

I tried:

* Committing before adding users (after `create_all`)
* Drop existing tables from the database (although it seems like the table never gets committed)
* `from models import User` instead of `import models` (before `create_all`)

Sorry if there are so many simillar questions, I promise I scavenged for answers, but it's always silly mistakes I made sure I didn't make (or atleast the ones I saw).

I am using MariaDB.

Sorry for long post, many thanks in advance.