Relating Wordpress Users with Order Export - php

Question

We are using Advanced Custom Fields, WP All Export Pro, and WordPress with Woocommerce.
I have an ACF field created for our accountant in users area of WordPress called "traverse_customer_id". This is for her to know what customer this order is for.
I have this ACF field showing in the orders export but the data comes back blank on each export. I think it's because I'm not relating the order with the customer or user ID. I've attempted to use a code snippet from WP All Exports' support without any luck. Could anyone with knowledge help me see what I'm doing wrong?
This is what I have in the "Custom export field" area: (I think this is running the function on each line of the import.)
[sf_helper_meta_query_lookup("traverse_customer_id",{Customer User ID},"user")]
Then I have this below in the Function Editor:
function sf_helper_meta_query_lookup( $meta_key = '', $meta_value = '', $object_type = 'post', $taxonomy = '', $return_field = 'ID', $compare = '=', $custom_args = array() ) {
if ( empty( $object_type ) || empty( $meta_key ) || empty( $meta_value ) ) return;
$func = 'get_posts';
switch ( $object_type ) {
case 'user':
$func = 'get_users';
break;
case 'term':
$func = 'get_terms';
if ( $return_field == 'ID' ) {
$return_field = 'term_id';
}
break;
default:
$func = 'get_posts';
break;
}
if ( ! empty( $custom_args ) ) {
$objects = $func( $custom_args );
if ( ! empty( $objects ) ) {
return $objects[0]->$return_field;
} else {
return false;
}
}
$args = array();
$meta_query = array( array(
'key' => $meta_key,
'value' => $meta_value,
'compare' => $compare
) );
if ( $func == 'get_terms' ) {
$args = array(
'taxonomy' => $taxonomy,
'hide_empty' => false,
'meta_query' => $meta_query
);
} elseif ( $func == 'get_users' ) {
$args = array(
'meta_query' => $meta_query
);
} else {
$args = array(
'post_type' => $object_type,
'meta_query' => $meta_query
);
}
if ( $objects = $func( $args ) ) {
return $objects[0]->$return_field;
} else {
return false;
}
}
Any help would be greatly appreciated!