|string> */ public function rules(): array { return [ 'province_id' => 'required|exists:provinces,id', 'edarate_ostani_id' => 'exists:edarate_ostanis,id', 'city_id' => 'exists:cities,id', 'edarate_shahri_id' => 'exists:edarate_shahris,id', 'username' => 'required|unique:users,username', 'national_code' => 'unique:users,national_code', 'password' => 'required|min:8', ]; } }