文件在 App\Exceptions\Handler.php

        /**    
         * 登录过期后的跳转地址
         * @param \Illuminate\Http\Request $request
         * @param AuthenticationException $exception
         * @return \Illuminate\Http\JsonResponse|\Illuminate\Http\RedirectResponse
         */
        protected function unauthenticated($request, AuthenticationException $exception)
        {
            $guards = $exception->guards();
            return $request->expectsJson()
                ? response()->json(['message' => $exception->getMessage()], 401)
                //: redirect()->guest(route('admin.login'));
                 : redirect()->guest(
                      in_array('web', $guards) ? route('admin.login') : route('sign_in')
                 );
        }