from django.contrib.auth import validators from django.db import migrations, models class Migration(migrations.Migration): dependencies = [ ('auth', '0006_require_contenttypes_0002'), ] operations = [ migrations.AlterField( model_name='user', name='username', field=models.CharField( error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 30 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=30, unique=True, validators=[validators.UnicodeUsernameValidator()], verbose_name='username', ), ), ]