services_core/app/Http/Requests/Auth/RegisterRequest.php

<?php

namespace App\Http\Requests\Auth;

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class RegisterRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    public function rules(): array
    {
        return [
            'name' => ['required', 'string', 'max:100'],
            'username' => ['nullable', 'string', 'max:50', 'unique:users,username'],
            'email' => ['required', 'email', 'max:100', 'unique:users,email'],
            'whatsapp_number' => ['required', 'string', 'max:20'],
            'password' => ['required', 'string', 'min:8', 'max:100'],
            'verification_channel' => ['required', Rule::in(['email', 'whatsapp'])],
            'verification_target' => ['required', 'string', 'max:100'],
        ];
    }
}