Code:
// User IDs in $ids variable.
$emailAddresses = list();
$i = 0;
while ($i < array\length($ids)) {
$userId = array\at($ids, $i);
$emailAddress = record\attribute('User', $userId, 'emailAddress');
if ($emailAddress) {
$emailAddresses = array\push($emailAddresses, $emailAddress);
}
$i = $i + 1;
}

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