List all loyalty program customers.
| Parameter | Type | Description |
|---|---|---|
filter[email] | string | Partial, case-insensitive email match |
filter[loyalty_status] | string | Filter by member or excluded |
sort | string | Sort field. Prefix with - for descending. Options: created_at, points, lifetime_points, redeemed_points |
page[number] | integer | Page number (default: 1) |
page[size] | integer | Results per page (default: 20, max: 100) |