results: Array
(
[member_ref] => 5420
[activity_id] =>
[activity_date] => 2020-10-01
[activity_type] => Subscription
[activity_description] => AMERBAC group membership subscription 2020
[activity_cost] => 0
[renewal_date] =>
[payment_date] =>
[payment_reference] =>
[invoice_date] =>
[invoice_reference] =>
)