text: from django.contrib.auth.models import AbstractUser
  from django.db import models
  
  class CustomUser(AbstractUser):
      # when customizing the user, do not do the migrations first, you have to define the custom user first.
      # you can edit bet there is a process ...
      phone_number  = models.CharField(max_length=15, null = True, blank= True)
  
      def __str__(self):
          return self.email