Hi,
I don't think you can use this api to create your own private chat. Because the api is related to the chat and notification system that already exist and use in Moodle.
I don't think you can use this api to create your own private chat. Because the api is related to the chat and notification system that already exist and use in Moodle.
Linked to these icons: 
If I'm right.
Dominique.