We want to be able to share a document with a person even if this person
does not have an account in impress yet.
This code is ported from https://github.com/numerique-gouv/people.
We want to be able to control who can access a template via roles.
I added this feature on the TeamAccess model assuming that the teams
to which a user belongs can be retrieved via a `get_teams` method on
the user model. The idea is that this method will get the teams either
via a call to an external API or directly from the OIDC token upon
user login. This list of teams will probably have to be cached for
each user.
This project was copied and hacked to make a POC in a 2-day hackathon.
We need to clean and refactor things in order to get a first version
of the product we want.
