hey, just started using k2, I want to hire some people to write for my webpage, how do I give them access to k2 without giving them access to other parts of my site?

getk2.org/documentation/tips-a-tricks/item/201-allowing-users-to-submit-content

but that would give access to all users, not just the few that I would like to add article

create a k2 user group with rights and add them to that group
set the registared users not to have access in the k2 user groups