framework: Auth::user always returning null

• Laravel Version: 6.2.0
• PHP Version: 7.2.19
• Database Driver:Mysql

Description:

I was working on a blog projects API, and then found this kind of weird behavior that looks like a bug. While requesting user id in the function that returns user articles by id, it work all right, but on the other controller functions it always give null id. Here is my controller code. After trying different methods found around the web nothing seems to work!

`<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request; use App\Article; use Illuminate\Support\Facades\Auth;

class articles_controller extends Controller {

public function index()
{
    return Article::all();
}

public function show()
{
    return Article::where('user_id', auth()->user()->id)->get();
}

public function store(Request $request)
{  
    $user_id =Auth::user()->id;
    $article = new Article([
    'user_id' => $user_id,
    'title' => $request->title,
    'article' => $request->article,
  ]);
  
  $article->save();

  ddd($article);
  return $article;
}

public function delete(Request $request)
{
    $user_id = $request->user;
    $article = Article::where('user_id',$user_id)->first();
    $article->delete();

    return 204;
}

}`

`<?php

namespace App;

use Illuminate\Database\Eloquent\Model; use Illuminate\Foundation\Auth\User as Authenticatable;

class Article extends Authenticatable { protected $fillable = [ ‘title’, ‘article’];

protected $hidden = [ 'id','created_at', 'updated_at'];

public function user()
{
    return $this->belongsTo('App\User');
}

}`

`<?php

use Illuminate\Http\Request; use App\Article; use App\Controllers\UserController;

/* |--------------------------------------------------------------------------

API Routes
Here is where you can register API routes for your application. These
routes are loaded by the RouteServiceProvider within a group which
is assigned the “api” middleware group. Enjoy building your API!
*/

Route::post(‘login’, ‘UserController@login’); Route::post(‘register’, ‘UserController@register’);

Route::group([‘middleware’ => ‘auth:api’], function(){

Route::get('/article', 'articles_controller@index');
Route::get('/article/specific','articles_controller@show');
Route::post('article', 'articles_controller@store');
Route::patch('article/{id}', 'articles_controller@update');
Route::delete('article/delete', 'articles_controller@delete');

});` No matter what I try, always the show function works as it should while other functions return the id as null.