Laravel validation always returns 200 OK from API

I want to separate my validator with my controller, but API always responds with a 200 OK in Postman.

Request validation:

class PostRequest extends FormRequest
{
    use Types;

    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        // $auth = $this->request->user();
        return [
            'name'       => 'required|string|max:255',
            'country_id' => 'required|exists:countries,id',
            'city'       => 'required|max:255',
            'phone_no'   => 'required|regex:/[0-9]{10,13}/',
            'occupation' => 'required|max:255'
        ];
    }
}

SenderController:

public function store(PostRequest $request)
{
    $auth = $request->user();

    $sender = Sender::create([
        'name'          => $request->name,
        'country_id'    => $request->country_id,
        'city'          => $request->city,
        'phone_no'      => $request->phone_no,
        'occupation'    => $request->occupation
    ]);
    return new Resource($sender);
}

When I’m sending a request without name, it will return a response with a status of 200. I want to display $validator->errors() in my response when I forget to input name. How can I do that?

Route and call:

Route::post('sender', 'V1SenderController@store');

POST: localhost:8000/api/v1/sender

Answer

I solved the problem with adding more code in my PostRequest.php

public $validator = null;
protected function failedValidation($validator)
{
    $this->validator = $validator;
}

and I show the error message by using controller

if (isset($request->validator) && $request->validator->fails()) {
        return response()->json([
            'error_code'=> 'VALIDATION_ERROR', 
            'message'   => 'The given data was invalid.', 
            'errors'    => $request->validator->errors()
        ]);
    }