How to access fields in BaseAbstractUser?

Question

Django

Hello, I am doing user registration with AbstractBaseUser
views.py

from django.shortcuts import render, redirect
from django.contrib.auth import login, authenticate
from account.forms import RegistrationForm
from store.models import Customer
from .models import Account
from .decorators import *


def registration_view(request):
  context = {}
  if request.POST:
    form = RegistrationForm(request.POST)
    if form.is_valid():
      form.save()
      email = form.cleaned_data.get('email')
      raw_password = form.cleaned_data.get('password1')
      account = authenticate(email=email, password=raw_password)
      Customer.objects.create(user=account, email=account.email)
      login(request, account)
      return redirect('store')
    else:
      context['registration_form'] = form
  else: 
    form = RegistrationForm()
    context['registration_form'] = form
  return render(request, 'account/register.html', context)

Issue:
Customer.objects.create(user=account, email=account.email) throws an IntegrityError at /register/
UNIQUE constraint failed: store_customer.user_id.

How to correctly access the fields of the account model or is the problem something else?

user model

class Account(AbstractBaseUser):
  email= models.EmailField(verbose_name="email", max_length=60, unique=True)
  username = models.CharField(max_length=30, unique=True)
  date_joined = models.DateTimeField(verbose_name='date joined', auto_now_add=True)
  last_login = models.DateTimeField(verbose_name='last login', auto_now=True)
  is_admin	= models.BooleanField(default=False)
  is_active = models.BooleanField(default=True)
  is_staff = models.BooleanField(default=False)
  is_superuser = models.BooleanField(default=False)

customer model:

class Customer(models.Model):
    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, null=True, blank=True)
    name = models.CharField(max_length=200, null=True)
    email = models.CharField(max_length=200, null=True)
    phone_number = PhoneNumberField(null=True, blank=True)
    date_created = models.DateTimeField(auto_now_add=True, null=True)

    class Meta:
        verbose_name_plural = "Customers"

    def __str__(self):
        return str(self.name)