Source tracking for API registrant

Is your feature request related to a problem? Please describe.

I am working on API integration with my site. In this process i using Add Webinar Registrant API, to webinar registrants. So here i want to track this registrant from where is registered like through API or any other source. So i just reached to dev support team and found out that there is no method currently to track API registrant and asked me to post in feature request to be considered for a future release.

Please give us a feature to track API registrant and let me know if you have any solution right away.

Describe alternatives you’ve considered
I added a field called “Source Name” under custom_questions but the filed is showing in the zoom registration form, there is no setting to hide this field as i will send this when the registrant come through the Add Webinar Registrant API, in other cases i don’t want to show this filed in the registration.

Attached screen shot for your reference.