from django.contrib.auth import validators from django.db import migrations, models class Migration(migrations.Migration): dependencies = [ ('auth', '0003_alter_user_email_max_length'), ] # No database changes; modifies validators and error_messages (#13147). operations = [ migrations.AlterField( model_name='user', name='username', field=models.CharField( error_messages={'unique': 'A user with that username already exists.'}, max_length=30, validators=[validators.UnicodeUsernameValidator()], help_text='Required. 30 characters or fewer. Letters, digits and @/./+/-/_ only.', unique=True, verbose_name='username' ), ), ]