Is there a way to logout user from chat programatically?

Is there a way to logout user from chat programatically , as we do using signout button in traditional webapps?

I wanted to build a chat website where users wil be registered directly into Openfire server, Suppose i have 10 users online and one of the users would like to signout. How would i perform signout the user using SMACK API.

I'm using Smack API (4.0) , Openfire server , Spark 3.9.3 client.

Any inputs will be greatly appreciated.

Thanks

Gregs.