I am getting Error: Object of class OssnUser could not be converted to string in /var/www/vhosts/localapp.live/prod.localapp.live/components/RecordMaint/ossn_com.php:181

$user = ossn_loggedin_user();
$database = new OssnDatabase();

$params = array();
$params["from"] = "ossn_object";
$params["params"] = array("guid","title");
$params["wheres"] = array("guid = ".$params_in["group_guid"]);
$data = $database->select($params);

$abc = "";
$chars = "23456791xTHCMYGREtheuckmyrbrwnfxjumpsivertheazymyrd-RWNFXMT12345679PZSVXEWRTHAZYMYGRD2345679";
for( $i = 0; $i < 12; $i++ )
{ $abc .= $chars[ mt_rand(0, 31 ) ]; }

$params["into"]   = "mgr_calendars";
$params["names"]  = array(
    "cal_id",
    "cal_owner",
    "cal_group_id",
    "cal_name",
    "cal_link"
);
$params["values"] = array(
    0,
    $user->guid,
    $data->guid,
    $data->title,
    "$abc"
);
$calid = $database->getLastEntry();

Line 181 folllows

$query = "INSERT INTO mgr_calusers (cu_id, cu_cal_id, cu_user_id, cu_group_id, cu_admin, cu_active) VALUES (0, $calid, $user, ".$data->guid.", 1, 1)";
$database->statement($query);
$database->execute();