Custom User Model for Django

models.py

from django.db import models
from django.contrib.auth.models import AbstractUser

class CustomUser(AbstractUser):
    username = models.CharField(
        max_length=200, 
        unique=True,
        help_text='Required. Letters, digits, and spaces only.',
        validators=[],
        error_messages={
            'unique': "That username is taken. Please try another username.",
        },
    )