using mongoengine > 0.8, referencefields now store objectids not dbrefs

[dblado]

thinking maybe this needs to change from:
class UserSocialAuth(Document, DjangoUserMixin):
"""Social Auth association model"""
user = ReferenceField(USER_MODEL, dbref=True)
provider = StringField(max_length=32)
uid = StringField(max_length=255, unique_with='provider')
extra_data = DictField()

to:
class UserSocialAuth(Document, DjangoUserMixin):
"""Social Auth association model"""
user = ReferenceField(USER_MODEL)
provider = StringField(max_length=32)
uid = StringField(max_length=255, unique_with='provider')
extra_data = DictField()

[omab]

Changed, thanks!