def get_register_router(
        self, after_register: Optional[Callable[[models.UD, Request], None]] = None,
    ) -> APIRouter:
        """
        Return a router with a register route.

        :param after_register: Optional function called
        after a successful registration.
        """
        return get_register_router(
            self.db,
            self._user_model,
            self._user_create_model,
            self._user_db_model,
            after_register,
        ) 

def get_reset_password_router(
        self,
        reset_password_token_secret: str,
        reset_password_token_lifetime_seconds: int = 3600,
        after_forgot_password: Optional[
            Callable[[models.UD, str, Request], None]
        ] = None,
    ) -> APIRouter:
        """
        Return a reset password process router.

        :param reset_password_token_secret: Secret to encode reset password token.
        :param reset_password_token_lifetime_seconds: Lifetime of reset password token.
        :param after_forgot_password: Optional function called after a successful
        forgot password request.
        """
        return get_reset_password_router(
            self.db,
            reset_password_token_secret,
            reset_password_token_lifetime_seconds,
            after_forgot_password,
        ) 

def get_users_router(
        self,
        after_update: Optional[
            Callable[[models.UD, Dict[str, Any], Request], None]
        ] = None,
    ) -> APIRouter:
        """
        Return a router with routes to manage users.

        :param after_update: Optional function called
        after a successful user update.
        """
        return get_users_router(
            self.db,
            self._user_model,
            self._user_update_model,
            self._user_db_model,
            self.authenticator,
            after_update,
        ) 

def get_auth_router(self, backend: BaseAuthentication) -> APIRouter:
        """
        Return an auth router for a given authentication backend.

        :param backend: The authentication backend instance.
        """
        return get_auth_router(backend, self.db, self.authenticator) 

def get_oauth_router(
        self,
        oauth_client: BaseOAuth2,
        state_secret: str,
        redirect_url: str = None,
        after_register: Optional[Callable[[models.UD, Request], None]] = None,
    ) -> APIRouter:
        """
        Return an OAuth router for a given OAuth client.

        :param oauth_client: The HTTPX OAuth client instance.
        :param state_secret: Secret used to encode the state JWT.
        :param redirect_url: Optional arbitrary redirect URL for the OAuth2 flow.
        If not given, the URL to the callback endpoint will be generated.
        :param after_register: Optional function called
        after a successful registration.
        """
        return get_oauth_router(
            oauth_client,
            self.db,
            self._user_db_model,
            self.authenticator,
            state_secret,
            redirect_url,
            after_register,
        ) 

def get_register_router(
    user_db: BaseUserDatabase[models.BaseUserDB],
    user_model: Type[models.BaseUser],
    user_create_model: Type[models.BaseUserCreate],
    user_db_model: Type[models.BaseUserDB],
    after_register: Optional[Callable[[models.UD, Request], None]] = None,
) -> APIRouter:
    """Generate a router with the register route."""
    router = APIRouter()

    @router.post(
        "/register", response_model=user_model, status_code=status.HTTP_201_CREATED
    )
    async def register(request: Request, user: user_create_model):  # type: ignore
        user = cast(models.BaseUserCreate, user)  # Prevent mypy complain
        existing_user = await user_db.get_by_email(user.email)

        if existing_user is not None:
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=ErrorCode.REGISTER_USER_ALREADY_EXISTS,
            )

        hashed_password = get_password_hash(user.password)
        db_user = user_db_model(
            **user.create_update_dict(), hashed_password=hashed_password
        )
        created_user = await user_db.create(db_user)

        if after_register:
            await run_handler(after_register, created_user, request)

        return created_user

    return router