AUTHENTICATION_BACKENDS = (
    'django.contrib.auth.backends.ModelBackend',
    'social.backends.facebook.FacebookOAuth2',
    'social.backends.google.GoogleOAuth2',
    'social.backends.twitter.TwitterOAuth',
)

LOGIN_REDIRECT_URL = '/home'
LOGOUT_REDIRECT_URL = '/index'

SOCIAL_AUTH_PIPELINE = (
    'social_core.pipeline.social_auth.social_details',
    'social_core.pipeline.social_auth.social_uid',
    'social_core.pipeline.social_auth.auth_allowed',
    'social_core.pipeline.social_auth.social_user',
    'userlogin.auth_pipline.signup.create_user',
    'social_core.pipeline.social_auth.associate_by_email',
    'social_core.pipeline.social_auth.associate_user',
    'social_core.pipeline.social_auth.load_extra_data',
    'social_core.pipeline.user.user_details',
)

from django.contrib.auth.models import User
from django.contrib.auth import login
from django.core.exceptions import ObjectDoesNotExist
from django.contrib.auth import get_user_model
User = get_user_model()
from django.contrib.auth.backends import ModelBackend
from django.utils.crypto import get_random_string


def create_user(strategy=None, backend=None, details=None, response=None, request=None, *args, **kwargs):
    provider = backend.name
    try:
        user = User.objects.get(email=details['email'])
    except ObjectDoesNotExist:
        user = User.objects.create_user(email=details['email'], name=details['fullname'],
                                        password=get_random_string(length=10, allowed_chars='abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789'))

    if provider == "facebook":
        user.fb_id = response["id"]
        user.age = response["age_range"]["min"]
    elif provider == "twitter":
        user.tw_id = response["id"]
    else:
        user.gp_id = response["id"]

    login(strategy.request, user)

    return {'user': user}

from django.db import models
from .managers import UserManager
from django.contrib.auth.base_user import AbstractBaseUser
from django.contrib.auth.models import PermissionsMixin


class User(AbstractBaseUser, PermissionsMixin):

    # https://docs.djangoproject.com/en/1.10/topics/auth/customizing/
    # https://simpleisbetterthancomplex.com/tutorial/2016/07/22/how-to-extend-django-user-model.html#abstractbaseuser

    name = models.CharField(max_length=100, null=True)
    email = models.EmailField(unique=True)
    dob = models.DateField(null=True)
    is_active = models.BooleanField(default=True)
    date_joined = models.DateTimeField(null=True)
    is_superuser = models.BooleanField(default=False)
    is_staff = models.BooleanField(default=False)
    fb_id = models.CharField(max_length=255, null=True)
    gp_id = models.CharField(max_length=255, null=True)
    tw_id = models.CharField(max_length=255, null=True)
    gender = models.CharField(max_length=1, default="u")
    age = models.IntegerField(null=True)


    objects = UserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['name']

    def get_full_name(self):
        return self.email

    def get_short_name(self):
        return self.email

    def __str__(self):
        return self.name