Bug: Federated login email conflict

Background

• I have an account on localhost:8000 with email myemail@server.com
• I have an account on api.test-paris with email myemail@server.com

1. I go to localhost:8000/auth/login/ to login
2. I try to login with my api.test-paris account, by inputting https://api.test-paris.happy-dev.fr/ to the "Login using another authentification provider" form
3. I login to my account
4. This line is executed, to create a local copy of the user. It throws an error because of a conflict on email

As I understand OIDC, the point is that the user will have one login across multiple instances. So my questions are:

• am I correct in thinking that in the long-term, this is going to work in a different way? How should federated login work?
• Should anything be done about this now?

@sylvain I think you are probably most-informed to answer this?