Route Id Not working

I am creating a project called doctor management system. I am now stuck in this that when a user logged in his page my route function get the specific id & then show his information. But when I logged in it did not get id & that's why it put some error but When I manuaaly enter the id it worked perfectly ok. I did not find why this occurs. Please Guys Help Me.

My Route File

Route::group([
    'middleware' => 'auth'
    ], function() {


        Route::get('/home/{profile_id}', [
        'as' => 'admin',
        'uses' => 'AdminController@index'
    ]);

        Route::get('/profile/{profile_id}', array('as' =>'profile' ,'uses' => 'ProfileController@index'));

My profile Controler is

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests;
use App\Http\Controllers\Controller;
use App\User;

class ProfileController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */

    public function index($profile_id)
    {
        $profile = User::find($profile_id);
        // if(!$profile) {
        //     return redirect()->route('logout')->with(['fail' => 'Profile Not Found']);
        // }
        return view('admin.article.index',['profile' => $profile]);
    }

The error is

via Chebli Mohamed