How to display error when using is_active for Login - django

Question

I set a user.is_active to false so they can't login.
user.is_active = False
user.save()
I would like to override the login section to show that the account has been disabled. Currently it shows on disabled accounts.
Please enter a correct username and password. Note that both fields may be case-sensitive.
I am using the auth login:
path('accounts/', include('django.contrib.auth.urls')),
With a simple template:
{% extends 'base.html' %}
{% block title %}Login{% endblock %}
{% block content %}
<h2>Log In</h2>
<form method="POST" action="."enctype="multipart/form-data">
{% csrf_token %}
{{ form.as_p }}
<button type="submit">Log In</button>
<button>Sign up</button>
</form>
{% endblock %}
I have seen something like where they override clean and call this function.
def confirm_login_allowed(self, user):
if not user.is_active:
raise forms.ValidationError(
"This account has been disabled",
code='inactive',
)

Answer 1

from django.contrib import messages
from django.contrib.auth.forms import AuthenticationForm
def login(request):
if request.method == 'POST':
form = AuthenticationForm(request.POST)
username = request.POST['username']
password = request.POST['password']
user = authenticate(username=username, password=password)
if user:
if user.is_active:
auth_login(request, user)
return redirect('home')
else:
messages.error(request,'User blocked')
return redirect('login')
else:
messages.error(request,'username or password not correct')
return redirect('login')
else:
form = AuthenticationForm()
return render(request, 'registration/login.html',{'form':form})
Just had to check is_active then send messages.error after overriding login.