results: Array
(
[member_ref] => 5215
[activity_id] =>
[activity_date] => 2021-09-15
[activity_type] => Subscription
[activity_description] => EASE 2021 membership subscription (part year)
[activity_cost] => 23.50
[renewal_date] => 2021-09-15
[payment_date] => 2021-09-15
[payment_reference] => WP19988778758
[invoice_date] =>
[invoice_reference] =>
)