The future way to connect is the following. Here you don't need a S-User. You just need the API keys as specified below.
To start the creation goto to the Configuraiton -> Agent.
Select the "Create CPI Agent" since this will guide you thru the setup process
Then enter the name of the system like Dev-CI or IS this is what you will use to select the agent.
Then the url is what you will normally use for creating the agent.
There is a different flow if it is Neo, Cloud Foudry and Integration Suite. The guide steps will show you what is needed.
You will need your S-User and the password for it.
In the guide you will be asked ofr URL of the runtime
You need to create the service keys for using in the API. Just copy the JSON key and insert into the resulting guides.
There are two part of this
1) First the Service keys for both API and Message see
2) Once you have completed thise you need to create a Custom IDP setup to allow Figaf to login using the web ui.