WARNING: RemovedIn20Warning: "UserSocialAuth" object is being merged into a Session along the backref cascade path for relationship "User.social_auth"; in SQLAlchemy 2.0, this reverse cascade will not take place. Set cascade_backrefs to False in either the relationship() or backref() function for the 2.0 behavior; or to set globally for the whole Session, set the future=True flag (Background on this error at: https://sqlalche.me/e/14/s9r1) (Background on SQLAlchemy 2.0 at: https://sqlalche.me/e/b8d9) in site-packages/social_sqlalchemy/storage.py:58
Activating SqlAlchemy 2 warnings results in:
It looks like this issue is listed as resolved in this changelog and awaiting release:
https://github.com/python-social-auth/social-storage-sqlalchemy/blob/master/CHANGELOG.md