Zoom API Cloud recording retrieval App not populating

I have created a small python app that should be retrieving my cloud recordings according to a date range i select.

the app connects fine to the API (no more errors) but finds 0 recordings

This is the bit of code responsible for locating the recordings and search parameters:

while True:
url = f’xxxx://api.zoom.us/v2/users/{user_id}/recordings’
params = {
‘page_size’: 300,
‘next_page_token’: next_page_token,
‘from’: from_date,
‘to’: to_date

any suggestions please?

many thanks in advance