public function getContractSalary($id_user){
        $realtys = Realty::join('tenancy', function ($join) use ($id_user) {
                        $join->on('id_realty', '=', 'tenancy.realty_id_realty')
                        ->where('user_id_user', '=', $id_user);
                        //->whereMonth('realty.created_at', '=', date('m'));
                    })->select('tenancy.value as tvalue', 'realty.realty_contract_tax')->get();
        return $realtys;
    }