Update ad.py

[concaption]

As shown on this link we need to add ad_active time.

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[concaption]

Also, filtering on ad_active_time is not supported. How can we get those ads that became active during any period? or how can we get ads that were active during that period.

{'error': {'message': "(#100) Filtering field 'ad_active_time' is not supported", 'type': 'OAuthException', 'code': 100, 'error_data': 'An unknown error occurred', 'fbtrace_id': 'APvto-85kj-YDa9tyPREtbF'}}

[concaption]

I think ad_active_time is 0 for all my ads. Also the filter on update_time is not working.

[stcheng]

Hello @concaption after checking internally, we have confirmed that this field is an internal only field and shall not be exposed. We will remove this field from the documentation as well as in the SDK later. Sorry for the confusion.