fix(socialaccount) SocialLogin is_existing returns boolean
fix(socialaccount) SocialLogin is_existing returns boolean

bittner/django-allauth,rsalmaso/django-allauth,lukeburden/django-allauth,pennersr/django-allauth,rsalmaso/django-allauth,lukeburden/django-allauth,pennersr/django-allauth,pennersr/django-allauth,bittner/django-allauth,rsalmaso/django-allauth,lukeburden/django-allauth,bittner/django-allauth