How to use CustomUser with dj_rest_auth to sign up with email and password

How to use CustomUser with dj_rest_auth to register with email and password.

I have the source code below, but the username information is required during the sign-up process.

I would like to know how to sign up with only the email, password1, and password2 information.

---

settings.py

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'accounts',
    'rest_framework',
    'dj_rest_auth',
    'dj_rest_auth.registration',
    'django.contrib.sites',
    'allauth',
    'allauth.account',
    'allauth.socialaccount',
    'rest_framework.authtoken'
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'allauth.account.middleware.AccountMiddleware'
]

SITE_ID = 1

AUTH_USER_MODEL = 'accounts.CustomUser'

ACCOUNT_USER_MODEL_USERNAME_FIELD = None
ACCOUNT_USERNAME_REQUIRED = False

ACCOUNT_SIGNUP_FIELDS = ['email', 'password1', 'password2']
ACCOUNT_AUTHENTICATION_METHOD = 'email'

ACCOUNT_EMAIL_VERIFICATION = 'none'

REST_AUTH_REGISTER_SERIALIZERS = {
    'REGISTER_SERIALIZER': 'accounts.serializers.CustomRegisterSerializer',
}

accounts/models.py

from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin, BaseUserManager
from django.db import models

class CustomUserManager(BaseUserManager):
    def create_user(self, email, password=None, **extra_fields):
        if not email:
            raise ValueError('The Email field must be set')
        email = self.normalize_email(email)
        user = self.model(email=email, **extra_fields)
        user.set_password(password)
        user.save(using=self._db)
        return user

    def create_superuser(self, email, password=None, **extra_fields):
        extra_fields.setdefault('is_staff', True)
        extra_fields.setdefault('is_superuser', True)
        return self.create_user(email, password, **extra_fields)

class CustomUser(AbstractBaseUser, PermissionsMixin):
    email = models.EmailField(unique=True)
    is_active = models.BooleanField(default=True)
    is_staff = models.BooleanField(default=False)
    date_joined = models.DateTimeField(auto_now_add=True)

    objects = CustomUserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    def __str__(self):
        return self.email

accounts/serializers .py

from dj_rest_auth.registration.serializers import RegisterSerializer

class CustomRegisterSerializer(RegisterSerializer):
    def get_cleaned_data(self):
        return {
            'email': self.validated_data.get('email', ''),
            'password1': self.validated_data.get('password1', ''),
            'password2': self.validated_data.get('password2', ''),
        }

project/urls.py

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('auth/', include('dj_rest_auth.urls')),
    path('auth/registration/', include('dj_rest_auth.registration.urls')),
]

---

Django 4.2

dj-rest-auth 7.0.1

django-allauth 65.9.0

djangorestframework 3.16.0

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