laravel框架 , 前台使用ajax提交表单数据,
当type: 'get'时,后台可以通过$request->user()->id 获取到用户id,
但是
当type: 'post'时,后台通过$request->user()->id 报错500.

routes.php

Route::group(['middleware' => 'web'], function () {
    Route::auth();
    //这个url使用post报错
    Route::get('/index/folder', "IndexController@folder");
});

controllder

    public function folder(Request $request, FoldersRepository $FoldersRep) {
        return response($request->user()->id);
    }

js

    $.ajax({
        type: 'get',
        url: "/index/folder",
        data: formData,
        success: function (data) {
            console.log(data);
            debugger

请问这是怎么回事,如何解决?