trying make outh app

[abdelbar472]

i'm using scylla for database for my gradution project got a problems

from django.contrib.auth.backends import BaseBackend
from .models import User
from cassandra.cluster import Cluster
from cassandra.query import SimpleStatement

class CassandraAuthBackend(BaseBackend):
def init(self):
# Initialize Cassandra connection
cluster = Cluster(['127.0.0.1']) # Update with your Cassandra cluster node(s)
self.session = cluster.connect('galileo') # Replace with your keyspace

def authenticate(self, request, username=None, password=None, **kwargs):
    if not username or not password:
        return None  # Return None if credentials are incomplete

    try:
        # Query the Cassandra database for the user
        query = SimpleStatement(
            "SELECT * FROM user WHERE username=%s ALLOW FILTERING", fetch_size=1
        )
        rows = self.session.execute(query, (username,))
        user_data = next(iter(rows), None)  # Get the first result, or None if no results

        if user_data:
            # Create a `User` instance manually
            user = User(
                user_id=user_data.user_id,
                username=user_data.username,
                email=user_data.email,
                password_hash=user_data.password_hash,
                first_name=user_data.first_name,
                last_name=user_data.last_name,
            )
            # Check the password
            if user.check_password(password):
                return user
            else:
                print("Password mismatch")
        else:
            print("No user found for username")
    except Exception as e:
        print(f"Authentication error: {e}")

    return None  # Explicitly return None if authentication fails

def get_user(self, user_id):
    try:
        # Query Cassandra to get a user by user_id
        query = SimpleStatement(
            "SELECT * FROM user WHERE user_id=%s ALLOW FILTERING", fetch_size=1
        )
        rows = self.session.execute(query, (user_id,))
        user_data = next(iter(rows), None)

        if user_data:
            # Create and return a `User` object
            return User(
                user_id=user_data.user_id,
                username=user_data.username,
                email=user_data.email,
                password_hash=user_data.password_hash,
                first_name=user_data.first_name,
                last_name=user_data.last_name,
            )
    except Exception as e:
        print(f"Error fetching user by user_id: {e}")

    return None  # Explicitly return None if no user is found