Add refresh token implementation

[Ae-Mc]

Add refresh token strategy, bearer token structure, database base class.
Need help with JWT and redis strategies.
Need help with cookie transport.
Need help with test writing (I will wrote it later, but tests must be reviewed by somebody more professional).
Need help with docs.

It can solve discussion #350.
In difference with pull request #1075 by @jtv8 this pull request doesn't change so much. Mostly it adds new classes, without changing old.

[hasB4K]

I would love to see this PR merged into fastapi-users. The refresh token is something that is often necessary when a project start to scale. @frankie567 what do you think? :)

[Chiggy-Playz]

@Ae-Mc is this PR in a usable state right now? I'd like to clone it locally and try it out in my project

[Ae-Mc]

@Chiggy-Playz I'm using it right now on one of my projects

[Chiggy-Playz]

I see. If the repository is public can you link me where its used? I'd like to get an idea of how to set things up properly 😅

[Ae-Mc]

Commit where I migrate from handmade version to library version: Ae-Mc/climbing-app-backend@f2516e7

Look at files
climbing/api/api_v1/endpoints/auth.py
climbing/core/security.py
climbing/db/models/user.py
climbing/db/session.py
pyproject.toml

[Chiggy-Playz]

@Ae-Mc thanks for the links! I think i've managed to implement it properly in my project as well (hopefully), however I did find a bug. The DatabaseRefreshStrategy has a parameter refresh_lifetime_seconds but that is not used anywhere. So I added the following code

    def _refresh_get_max_age(self) -> Optional[datetime]:
        max_age = None
        if self.refresh_lifetime_seconds:
            max_age = datetime.now(timezone.utc) - timedelta(
                seconds=self.refresh_lifetime_seconds
            )
        return max_age

inside the DatabaseRefreshStrategy class and then inside the read_token_by_refresh I use _refresh_get_max_age instead of _get_max_age. I've opened a PR on your repository and I'd be glad if you could merge it 😁

[abdullah-alnahas]

Hello,

I was wondering if you have any estimated timelines for when the merge will be completed and the release will take place.

[hasB4K]

@abdullah-alnahas It really depends if @frankie567 wants this feature or not. Since he didn't answer yet, it's not even sure that this PR will even be accepted.