How to get all multi-select user meta values and add them to an array?

I figured it out…

$meta_value = get_user_meta( $atts['owner'], $meta_key, true );

$store_numbers = array();
foreach ($meta_value as $store_number) {
    $store_numbers[] = 'shop'.$store_number;
}

$usernames = $store_numbers;

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