Accept both username or email for authentication

[victornovais]

Today we have been seeing authentications that accept bot username or emails for validating an user. We would be great to have that here.

At first, you could add a settings attribute giving the possibility to authenticate user by email or username or both.

[twz915]

@victornovais A customized version of User Backend will work
https://docs.djangoproject.com/en/dev/topics/auth/customizing/#writing-an-authentication-backend

[SaltNego]

/webwen/auth1$ python manage.py migrate
Operations to perform:
Apply all migrations: admin, auth, contenttypes, sessions, users
Running migrations:
No migrations to apply.
Traceback (most recent call last):
File "manage.py", line 22, in
execute_from_command_line(sys.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/init.py", line 364, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python2.7/dist-packages/django/core/management/init.py", line 356, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 330, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/migrate.py", line 227, in handle
self.verbosity, self.interactive, connection.alias, apps=post_migrate_apps, plan=plan,
File "/usr/local/lib/python2.7/dist-packages/django/core/management/sql.py", line 53, in emit_post_migrate_signal
**kwargs
File "/usr/local/lib/python2.7/dist-packages/django/dispatch/dispatcher.py", line 193, in send
for receiver in self._live_receivers(sender)
File "/usr/local/lib/python2.7/dist-packages/users/utils.py", line 49, in auto_create_superuser
User.base_objects.get(email=email)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 374, in get
num = len(clone)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 232, in len
self._fetch_all()
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 1118, in _fetch_all
self._result_cache = list(self._iterable_class(self))
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 53, in iter
results = compiler.execute_sql(chunked_fetch=self.chunked_fetch)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 894, in execute_sql
raise original_exception
django.db.utils.OperationalError: no such table: users_user

[laiqun]

Also me occur this question,I remeber the solution is make some migration first.
I't may be
python manage.py migrate users