$query = "UPDATE " . SQL_PREFIX . "users SET $value=:value WHERE user_id = :id";
$stmt = $conn->prepare($query);
$stmt->execute(["value" => $val, "id" => $user->id]);
$query = "UPDATE " . SQL_PREFIX . "users SET $value=:value WHERE user_id = :id";
$stmt = $conn->prepare($query);
$stmt->execute(["value" => $val, "id" => $user->id]);