h5-api/app/Http/Requests/FormRequest.php

<?php

namespace App\Http\Requests;
use Dingo\Api\Http\FormRequest as BaseFormRequest;
use Illuminate\Http\Exceptions\HttpResponseException;

class FormRequest extends BaseFormRequest
{
    public function authorize()
    {
        return true;
    }


    public function failedValidation($validator)
    {

        $error= $validator->errors()->all();
        throw new HttpResponseException(response()->json(['code'=>202,'message'=>$error[0]]));

    }
}