Jitsi integration to my website

Hi.
İ have website which user can register and create group. I installed jitsi to subdomain of my website for video conferencing of groups members. But how I can create jitsi rooms for each group which only group members can join?

(In short how can I create if user is logged in and member of X group get access jitsi room of this group)

You can integrate jitsi-meet using jwt and control access to to rooms using that.
Using username/password authentication there is no such feature.

Thank you, for reply. Please let me know, can I create the room link(name) which include my group id or name and give access for only this group members by using jwt? If yes, do you know any tutorial to guide me?

You can start by embedding the iframe api, the enable jwt tokens https://github.com/jitsi/lib-jitsi-meet/blob/master/doc/tokens.md and lock your deployment to use tokens and then start to generate and pass tokens based on your app authentication.