results: Array
(
[member_ref] => 5207
[contact_id] => 18417
[activity_id] =>
[activity_date] => 2022-06-23
[activity_type] => Conference registration
[activity_description] => 16th EASE Conference – online registration
[activity_detail] =>
[certificate_text] =>
[activity_cost] => 200
[renewal_date] => 2022-06-23
[payment_date] =>
[payment_reference] =>
[invoice_date] =>
[invoice_reference] =>
)