Checking if there is any validation error when using custom form request class

I am using Laravel 5.4. I have a custom form request class where I have my validation rules and messages and I use it in my controller like following :

public function store(CustomFormRequest $request)
{
  //
}

I am using ajax to send the request and when there is any validation error, Laravel throws an error with an HTTP response with a 422 status code including a JSON representation of the validation errors.

But I don't want that. Instead, inside my controller's method, I want to find out if there is any validation error and if there is any then I want to return a response with some additional data along with the validation messages, like this:

// Inside my Controller
public function store(CustomFormRequest $request)
{
   if ($validator->fails())
   {
        $errors = $validator->errors();

        return response()->json(array('status' => 2, 'msg' => $errors->all() ));
    }
}

Could you please help ? Thanks in advance.

via black_belt