New chat user creation using Mac apps

I want to create new chat user using Mac apps using xmpp framework and openfire.
How can I create new chat user using Mac apps ?

This question is very generic. In principle, any XMPP client can create a new user account with Openfire, using the “in-band registration” feature (which needs to be enabled in Openfire’s settings, as it is disabled by default). How this works for any specific client or library is specific to that project.

Thank you for helping for me!
Can you plz provide Where can I change “in-band registration” in my openfire server settings.
Thank you!

Thank you for information. I will check in my openfire server