Django:unable to login after creating custom super user

Question

After creating a superuser, for some reason, I was unable to log into the Django database. I think somehow the user I created is not accepted as a staff member account, though I set is_staff, True by default. By the way, creating a custom super user like that turned out to be a headache, lots of errors occurred and I am unable to get answers in the forums.

from asyncio.windows_events import NULL
from django.db import models
from django.utils import timezone
from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin, BaseUserManager


class CustomUserManager(BaseUserManager,):
    def create_superuser(self, email, user_name, password, about='Hi it is me', **other_fields):
        other_fields.setdefault('is_staff', True)
        other_fields.setdefault('is_superuser', True)
        other_fields.setdefault('is_active', True)
        if other_fields.get('is_staff') is not True:
            raise ValueError('super  user must be assigned to is_staff= True')
        if other_fields.get('is_superuser') is not True:

            raise ValueError(
                'Super user must be assigned to is_super_user=True')
        return self.create_user(email, user_name=user_name, password=password, about='Hi it is me', **other_fields)

    def create_user(self, email, user_name, password, about=None, **other_fields):
        if not email:
            raise ValueError(('You must provide an email address'))
        # for example ignore the case sensitivity
        email = self.normalize_email(email)
        user = self.model(email=email, user_name=user_name, about=about,)
        user.set_password(password)
        user.save()
        return user


class NewUser(AbstractBaseUser, PermissionsMixin):
    email = models.EmailField(max_length=255, unique=True)
    user_name = models.CharField(max_length=32, unique=True)
    about = models.CharField(max_length=512, blank=True, null=True)
    is_staff = models.BooleanField(default=False)
    is_active = models.BooleanField(default=False)
    objects = CustomUserManager()
    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['user_name']