$username = $_POST["user"];
$password = $_POST["pass"];
$password = md5($password);
$yes = 1;


if (isset($_POST['user']) && isset($_POST['pass'])) {
$findUser = $conn->prepare("SELECT USERID, Username, Password, SecurityGroup, FullName, Email, Active FROM tblUsers WHERE (Username = ?) AND (Password = ?) AND (Active = ?)");
$findUser->bind_param("ssi",$username,$password,$yes);
$findUser->execute();
$res = $findUser->store_result();

if($findUser->num_rows > 0){
  $_SESSION["username"] = $username;
  $_SESSION["securitygroup"] = $res['SecurityGroup'];  //NOT WORKING
  $_SESSION["fullname"] = $res["FullName"];            //NOT WORKING
  $_SESSION["Email"] = $res["Email"];                  //NOT WORKING
  $_SESSION["hold"] = time();
  $_SESSION["logged_in"] = true;

Array
(
    [securitygroup] =>
    [fullname] =>
    [Email] =>
    [username] => jord
    [hold] => 1533212901
    [logged_in] => 1

)