Get list of attendees on a Teams Meeting programmatically, while meeting is in progress

Hello,

I am trying to programmatically (through C#) get a list of attendees, WHILE the Teams Meeting is in progress. I am the owner of the meeting. I wanted to confirm that I was on the right path, as the sample code that I wrote is not returning anything:

- Is this the right documentation for the above scenario? https://docs.microsoft.com/en-us/graph/api/call-list-participants?view=graph-rest-1.0&tabs=http. Specifically, is the following the right call to be used?

GraphServiceClient graphClient = new GraphServiceClient( authProvider );

var participants = await graphClient.Communications.Calls["{call-id}"].Participants .Request() .GetAsync();

- Where can I find the [call-id] of the meeting, which is a parameter that needs to be passed in?

- Will the above code snippet work only when the meeting is in session or can I test after meeting as well?