NotFoundHttpException with my Request file on api route - laravel

Question

I made a route in the api file that allow everybody to create users :
Route::post('users', 'UserController#addUser');
When I called it in postman without using request validation it works. But when I created my request file and use it, Laravel return a NotFoundHttpException.
Here's my request file :
<?php
namespace App\Http\Requests;
use Illuminate\Foundation\Http\FormRequest;
class UserAddRequest extends FormRequest
{
/**
* Determine if the user is authorized to make this request.
*
* #return bool
*/
public function authorize()
{
return true;
}
/**
* Get the validation rules that apply to the request.
*
* #return array
*/
public function rules()
{
return [
'user_id' => 'required|numeric',
'name' => 'required|string',
'email' => 'required|string',
'password' => 'required|string'
];
}
}
public function addUser(UserAddRequest $request){
$user = new User;
$user->instance_user_id = $request->input('user_id');
$user->name = $request->input('name');
$user->email = $request->input('email');
$user->password = $request->input('password');
$user->save();
}
There is no form because it needs to be send directly to the server with post method. I declared my route in routes/api.php and I call it with the url /api/users The api in that case doesn't need to check credentials.

Answer 1

I solved my problem :
The NotFoundHttpException was raised because I didn't send my parametters correctly and Laravel doesn't where to redirect me back. When I send directly the request to the server there is no url declared for where I'm coming.