new_contents: # Generated by Django 2.2.24 on 2022-02-03 15:11
  
  import django.core.validators
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('kobo_auth', '0001_initial'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='user',
              name='username',
              field=models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 255 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=255, unique=True, validators=[django.core.validators.RegexValidator('^[\\w.@+-]+$', 'Enter a valid username. This value may contain only letters, numbers and @/./+/-/_ characters.', 'invalid')], verbose_name='username'),
          ),
      ]
  
subject: Add migration for User model generated by Django 2