How to set an array of current usernames

So right now you have this

if ($user && isset($user->user_login) && 'username' == $user->user_login ) {

To check for one specific user. If you want to check against multiple usernames, PHP’s function in_array() comes in handy

$allowed = array(
    'user1',
    'user2',
);
if ($user && isset($user->user_login) && in_array($user->user_login, $allowed) ) {

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