I want to restrict concurrency

When i want to restrict concurrency for an app what will i do?
1. I added wmsauthgroup.
2. my stream is for example like this: https://myserver.com/app1/app/stream/playlist.m3u8
So: I wrote app1 to application name field and app to application instance field and stream to stream field.
3. In Connections restriction section I wrote 200 to Connections count limit field. Than i saved that and also assign the server.

Is that correct? Is there anything that i must do for blocking the 201. user?

Hello.

That's correct.
Alternatively, you can create a PPV handler for checking the exact number of users connected and disconnecting if the limit exceeds.

Thank you.