async def forgot_password(
        self, user: models.UP, request: Optional[Request] = None
    ) -> None:
        """
        Start a forgot password request.

        Triggers the on_after_forgot_password handler on success.

        :param user: The user that forgot its password.
        :param request: Optional FastAPI request that
        triggered the operation, defaults to None.
        :raises UserInactive: The user is inactive.
        """
        if not user.is_active:
            raise exceptions.UserInactive()

        token_data = {
            "sub": str(user.id),
            "password_fgpt": self.password_helper.hash(user.hashed_password),
            "aud": self.reset_password_token_audience,
        }
        token = generate_jwt(
            token_data,
            self.reset_password_token_secret,
            self.reset_password_token_lifetime_seconds,
        )
        await self.on_after_forgot_password(user, token, request)