new_contents: # -*- coding: utf-8 -*-
  # Generated by Django 1.9.5 on 2016-06-15 20:17
  from __future__ import unicode_literals
  
  import django.core.validators
  from django.db import migrations, models
  
  
  class Migration(migrations.Migration):
      dependencies = [
          ('users', '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. 30 characters or fewer. Letters, digits and @/./+/-/_ only.',
                                     max_length=30, unique=True, validators=[
                      django.core.validators.RegexValidator('^[\\w.@+-]+$',
                                                            'Enter a valid username. This value may contain only letters, numbers and @/./+/-/_ characters.')],
                                     verbose_name='username'),
          ),
      ]
  
subject: Add missing migration