Why does form.is_valid() return false?

Question

Django

In short, I write user registration, all my code is below:
forms.py

from django.contrib.auth.models import User
from django import forms

class UserAuthenticationForm(forms.Form):
    username = forms.CharField()
    password = forms.CharField(widget=forms.PasswordInput)

class UserRegistrationForm(forms.ModelForm):
    password = forms.CharField(label='password', widget=forms.PasswordInput)
    password2 = forms.CharField(label='Repeat password', widget=forms.PasswordInput)

    class Meta:
        model = User
        fields = ('username', 'first_name', 'last_name', 'email')

    def clean_password2(self):
        cd = self.cleaned_data
        print('loh')
        if cd['password'] != cd['password2']:
            print('loh')
            raise forms.ValidationError('Passwords do not match.')
        return cd['password2']

views.py

def loginUser(request):
    if request.method == 'POST':
        reg_form = UserRegistrationForm(request.POST)
        print(reg_form['username'])
        print(reg_form['password'])
        if reg_form.is_valid():
            cd = reg_form.cleaned_data
            new_user = reg_form.save(commit=False)
            new_user.set_password(cd['password'])
            new_user.save()
            print(1)
            return render(request, 'friendbook/register_done.html', {'new_user':new_user})
        else:
            return HttpResponse('gugli')
    else:
        reg_form = UserRegistrationForm()
    return render(request, 'registration/login.html', {'reg_form':reg_form})

login.html

{% extends 'friendbook/base.html' %}
{% load static %}
{% block extra_css %}
    <link rel="stylesheet" href="{% static 'css/login_style.css' %}">
{% endblock %}
{% block content %}
<main>
    <div class="main_part container-xxl w-100 main_part">
        <form class="row g-3" action="" method="post">
            {% csrf_token %}
          <div class="col-md-6">
            <label for="{{ form.first_name.id_for_label }}" class="form-label">First name</label>
            <input type="text" class="form-control" name="{{ form.first_name.html_name }}" id="{{ form.first_name.id_for_label }}">
          </div>
          <div class="col-md-6">
            <label for="{{ form.last_name.id_for_label }}" class="form-label">Last name</label>
            <input type="text" class="form-control" name="{{ form.last_name.html_name }}" id="{{ form.last_name.id_for_label }}">
          </div>
          <div class="col-12">
            <label for="{{ form.email.id_for_label }}" class="form-label">Email</label>
            <input type="email" class="form-control" name="{{ form.email.html_name }}" id="{{ form.email.id_for_label }}" placeholder="[email protected]">
          </div>
          <div class="col-12">
            <label for="{{ form.username.id_for_label }}" class="form-label">Login</label>
            <input type="text" class="form-control" name="{{ form.username.html_name }}" id="{{ form.username.id_for_label }}" placeholder="">
          </div>
          <div class="col-md-6">
            <label for="{{ form.password.id_for_label }}" class="form-label">Password</label>
            <input type="password" class="form-control" name="{{ form.password.html_name }}" id="{{ form.password.id_for_label }}">
          </div>
          <div class="col-md-6">
            <label for="{{ form.password2.id_for_label }}" class="form-label">Confirm password</label>
            <input type="password" class="form-control" name="{{ form.password2.html_name }}" id="{{ form.password2.id_for_label }}">
          </div>
          <div class="col-12">
            <div class="form-check">
              <input class="form-check-input" type="checkbox" id="gridCheck">
              <label class="form-check-label" for="gridCheck">
                Check me out
              </label>
            </div>
          </div>
          <div class="col-12">
            <button type="submit" class="btn btn-primary">Зарегистрироваться</button>
          </div>
          {{ form.errors }}
        </form>
    </div>
</main>
{% endblock %}

Well, in general, something is wrong with reg_form.is_valid() - it always returns false. I'm running a test on the site, I'm registering the user, I seem to be entering everything correctly, and everything seems to be fine in the view. If you have an extra couple of minutes, look at the code and give wise advice)

Answer 1

Why reinvent the wheel? There are ready made solutions in django for this
UserCreationForm / AuthenticationForm
PS Off.docs