ldc-legaulois/app/Http/Requests/Bo/Users/UpdateUserRequest.php

<?php

namespace App\Http\Requests\Bo\Users;

use Illuminate\Support\Facades\Gate;
use Illuminate\Validation\Rule;

class UpdateUserRequest extends StoreUserRequest
{
    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return Gate::check('update', $this->route('user'));
    }

    /**
     * Prepare the data for validation.
     */
    protected function prepareForValidation(): void
    {
        /** @var \App\Models\User $userModel */
        $userModel = request()->route()->parameter('user');
        /** @var \App\Models\User $authUserModel */
        $authUserModel = auth('backend')->user();
        $this->merge([
            'published'             => $authUserModel->getKey() !== $userModel->getKey() ?
                $this->boolean('published') :
                true,
        ]);
    }

    /**
     * Get the validation rules that apply to the request.
     */
    public function rules(): array
    {
        return array_merge(parent::rules(), [
            'email'    => [
                'required',
                'email:rfc,strict,dns,spoof,filter',
                Rule::unique('users', 'email')->ignore(\optional($this->route('user'))->getRouteKey()),
            ],
        ]);
    }
}