Zoom Webinar Object - Passcode Decode

I installed Zoom for Lightning App in Salesforce.

Object is 'Zoom Webinar'

Lightning Page, 'Passcode' Field equals 0sBRzP7DkqUlUtikpBK0BR84V0BkWK0HEvL5tgaw3s4=

There is a "Zoom Webinar Passcode Edit" Button, returns UI with decoded passcode, (i.e., above equals 347786).

Where can I access the encrypted key to decode the passcode for ZVC__Zoom_Webinar__c Object ZVC__Passcode__c text field?