name : EmailAvailable.php <?php namespace Statamic\Rules; use Closure; use Illuminate\Contracts\Validation\ValidationRule; use Statamic\Facades\User; class EmailAvailable implements ValidationRule { public function validate(string $attribute, mixed $value, Closure $fail): void { if (User::query()->where('email', trim($value))->count() !== 0) { $fail('statamic::validation.email_available')->translate(); } } }