fastadmin 禁止多地多端登录

public function login()
    {
        $account = $this->request->post('account');
        $password = $this->request->post('password');
        if (!$account || !$password) {
            $this->error(__('Invalid parameters'));
        }
        $ret = $this->auth->login($account, $password);
        if ($ret) {
            $userInfo = $this->auth->getUserinfo();
            $token = $userInfo['token']; // 获取当前登录的 token
            $config = \think\Config::get('token');
            $realToken = hash_hmac($config['hashalgo'], $token, $config['key']);
            if ($realToken) {
                // 删除该用户除了最新 token 以外的所有 token
                Db::name('user_token')
                    ->where('user_id', $userInfo['id'])
                    ->where('token','<>',$realToken)
                    ->delete();
            }

            $data = ['userinfo' => $userInfo];
            $this->success(__('Logged in successful'), $data);
        } else {
            $this->error($this->auth->getError());
        }
    }