sharix-open-user-model/models.py

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


class ShariXUser(AbstractUser):
    phone_number = models.CharField(max_length=18, unique=True, verbose_name="Номер телефона")
    avatar = models.ImageField(upload_to="useravatars/", null=True, blank=True, verbose_name="Аватар")

    USERNAME_FIELD = "phone_number"

    @property
    def full_name(self):
        if self.first_name and self.last_name:
            return f"{self.first_name} {self.last_name}"
        else:
            return self.username