Would it success if a registration create after start_time?

i’m trying to use create registrants api to create registration for webinar attendees, process went through if requests sent by start_time.
the problem is when i try to sent post requests after webinar is live, it won’t generate webinar url for the registrants.
how to register after webinar is started?

Hey @rayqian8, thanks for posting and using Zoom!

Are you getting any errors? What endpoint are you using?