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François Voron c4de66b81c Revamp authentication (#831)
* Implement Transport classes

* Implement authentication strategy classes

* Revamp authentication with Transport and Strategy

* Revamp strategy and OAuth so that they can use a callable dependency

* Update docstring

* Make ErrorCode a proper Enum and cleanup unused OpenAPI utils

* Remove useless check

* Tweak typing in authenticator

* Update docs

* Improve logout/destroy token logic

* Update docs

* Update docs

* Update docs and full examples

* Apply formatting to examples

* Update OAuth doc and examples

* Add migration doc

* Implement Redis session token

* Add Redis Session documentation

* RedisSession -> Redis

* Fix links in docs
2021-12-30 15:22:07 +01:00

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# Routers
We're almost there! The last step is to configure the `FastAPIUsers` object that will wire the user manager, the authentication classes and let us generate the actual **API routes**.
## Configure `FastAPIUsers`
Configure `FastAPIUsers` object with all the elements we defined before. More precisely:
* `get_user_manager`: Dependency callable getter to inject the
user manager class instance. See [UserManager](../user-manager.md).
* `auth_backends`: List of authentication backends. See [Authentication](../authentication/index.md).
* `user_model`: Pydantic model of a user.
* `user_create_model`: Pydantic model for creating a user.
* `user_update_model`: Pydantic model for updating a user.
* `user_db_model`: Pydantic model of a DB representation of a user.
```py
from fastapi_users import FastAPIUsers
fastapi_users = FastAPIUsers(
get_user_manager,
[auth_backend],
User,
UserCreate,
UserUpdate,
UserDB,
)
```
## Available routers
This helper class will let you generate useful routers to setup the authentication system. Each of them is **optional**, so you can pick only the one that you are interested in! Here are the routers provided:
* [Auth router](./auth.md): Provides `/login` and `/logout` routes for a given [authentication backend](../authentication/index.md).
* [Register router](./register.md): Provides `/register` routes to allow a user to create a new account.
* [Reset password router](./reset.md): Provides `/forgot-password` and `/reset-password` routes to allow a user to reset its password.
* [Verify router](./verify.md): Provides `/request-verify-token` and `/verify` routes to manage user e-mail verification.
* [Users router](./users.md): Provides routes to manage users.
* [OAuth router](../oauth.md): Provides routes to perform an OAuth authentication against a service provider (like Google or Facebook).
You should check out each of them to understand how to use them.