User and Password while using the uri_module

Hi everyone! Is there any possibility for me to create a user for an application, for instance Rocket.Chat, with ansible? I was using uri_module.
I tried to get the system info and login with ansible-playbook, which worked just fine for me. So basically I think it is possible to call the API with ansible.

But once i tried to create a new user, error happened.

I am not sure, if i understood the term “user” and “password” correctly. And i don’t know the value of these 2 parameters. Are they the coded token something or just the account information of Rocketchat?

Moreover, there should be more parameters for the authentication process: (https://rocket.chat/docs/developer-guides/rest-api/users/create/)

But I dont know where to put them? in the Body?

Thanks for your help!

best wishes

Huimin