Social Login username

adapter.py

# users/social/adapter.py
from allauth.account.utils import user_username, user_email, user_field
from allauth.socialaccount.adapter import DefaultSocialAccountAdapter
from allauth.utils import valid_email_or_none


class SocialAdapter(DefaultSocialAccountAdapter):
    def populate_user(self, request, sociallogin, data):
        provider = sociallogin.account.provider
        unique_id = sociallogin.account.extra_data['id']
        username = f'{provider}_{unique_id}'

        first_name = data.get('first_name')
        last_name = data.get('last_name')
        email = data.get('email')
        name = data.get('name')
        user = sociallogin.user
        user_username(user, username)
        user_email(user, valid_email_or_none(email) or '')
        name_parts = (name or '').partition(' ')
        user_field(user, 'first_name', first_name or name_parts[0])
        user_field(user, 'last_name', last_name or name_parts[2])
        return user

settings.py

# django-allauth
ACCOUNT_LOGOUT_ON_GET = False
ACCOUNT_UNIQUE_EMAIL = False
ACCOUNT_EMAIL_VERIFICATION = 'none'
ACCOUNT_EMAIL_REQUIRED = False
ACCOUNT_USERNAME_REQUIRED = True

SOCIALACCOUNT_ADAPTER = 'users.social.adapter.SocialAdapter'

urls.py

path('facebook-login', FacebookLoginView.as_view(), name='facebook-login'),

views.py

from allauth.socialaccount.providers.facebook.views import FacebookOAuth2Adapter
from rest_auth.registration.views import SocialLoginView


class FacebookLoginView(SocialLoginView):
    """
    Facebook Login

    ---
    페이스북 로그인, access_token만 전달하면 완료
    """
    adapter_class = FacebookOAuth2Adapter