Hi:
Your question falls under the category of Security Administration or Platform Administration. The Security Administration piece of the Platform Administration documentation is a 239 page document.
http://support.sas.com/documentation/configuration/bisecag.pdf
There is not a set of steps that can be posted to the forum. The whole Platform Administration documentation links are here:
http://support.sas.com/documentation/configuration/
For more help with your planning and configuration, I recommend that you contact SAS Technical Support or the people who installed the Enterprise Intelligence Platform for you. It is possible that they have started planning the security around users and groups for your installation.
cynthia