How to show a prompt 5mins before the end of the meeting?

I generate the Zoom meeting for the online counseling service by Zoom API. The duration of the meeting is 50 minutes. I have passed the duration: 50 parameter to the Zoom meeting API, but after the test, there are some problems I have to solve:

1. The meeting cannot auto-end when after 50 mins. It seems the only way to close a meeting is host to terminate the meeting manually.

2. We need to show a prompt to notify the user of the counseling is coming to an end 5 minutes before the end of the meetings.

Please help. Thanks.