Open Link will open new conference room?

Hello, is it possible that we can disable that function if someone call a url who related to our jitisi installation that direct by calling that url not open any new meeting? It will be good if that possible to only cann a direct url if that meeting still exist and if it not exist it should redirect to welcome page.

That is not possible as there will be no way to start a conference.
You are looking for something like

Hello, but if I use that like your link , only User who we was create on command line can open new rooms / conference right?

Is there not any possibility?

You can add some other type of authentication, check prosody docs for available options.
And use the same - only authenticated users to start a meeting.