keep the user logged in even though user changes password django

1. Import necessary modules:

from django.contrib.auth import update_session_auth_hash
from django.contrib.auth.decorators import login_required
from django.contrib import messages
from django.shortcuts import render, redirect

1. Create a view to handle password change:

@login_required
def change_password(request):
    if request.method == 'POST':
        # Form logic for changing password
        # ...

        # Update session after password change
        update_session_auth_hash(request, request.user)

        # Display success message
        messages.success(request, 'Your password was successfully updated!')

        return redirect('change_password')  # Redirect to the same page
    else:
        # Render password change form
        # ...

1. Update your URL configuration to include the password change view:

from django.urls import path
from .views import change_password

urlpatterns = [
    # Other URLs
    path('change_password/', change_password, name='change_password'),
    # ...
]

1. In your template, include a link to the password change view:

<!-- Include the link in your template -->
<a href="{% url 'change_password' %}">Change Password</a>

1. Ensure that the Django authentication URLs are included in your project's urls.py:

from django.contrib.auth import views as auth_views

urlpatterns = [
    # Other URLs
    path('accounts/', include('django.contrib.auth.urls')),
    # ...
]

1. Update your project's settings to use the SessionAuthenticationMiddleware:

MIDDLEWARE = [
    # Other middlewares
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    # ...
]

1. Make sure the SESSION_ENGINE is set to use the database-backed session engine:

SESSION_ENGINE = 'django.contrib.sessions.backends.db'

1. Configure your project's settings.py to use the SessionAuthenticationMiddleware:

AUTHENTICATION_BACKENDS = [
    'django.contrib.auth.backends.ModelBackend',
    # ...
]

1. Ensure that the SESSION_SAVE_EVERY_REQUEST setting is set to True:

SESSION_SAVE_EVERY_REQUEST = True

1. Update the login view to use the login_required decorator:

from django.contrib.auth.decorators import login_required

@login_required
def my_view(request):
    # Your view logic here
    # ...

Make sure to adapt these steps to fit the structure and requirements of your Django project.