How to block user agent and How to block access my stream from android apps?

I found some user agent in my wowza log, such as “Xtream-Codes IPTV Panel Pro”, “Internet TV/1.3.53 (Linux;Android 8.1.0) ExoPlayerLib/2.10.0” , “PlaySDK/5.8.0.8 (Linux;Android 6.0.1) ExoPlayerLib/2.8.2”
They are from apps . How to block them and How to block that access my stream from android apps?
I use security token v2 and they can still access my stream .

I would submit a support ticket so we can view your security configuration and see what you may be missing… While there is not a 100% sure way to stop people, your best bet is a combination of things.

Wowza Streaming Engine Manager lets you control basic security for source and playback connections. For example, you can require encoders or cameras that connect to Wowza Streaming Engine to use authentication, and you can control which IP addresses can connect to Wowza Streaming Engine for both publishing and playback.

And as you mentioned…security tokens.

https://www.wowza.com/support/open-ticket