How to use UltimateFacebook to autopost to page, when we have different users to write posts?

We have a website using ultimate facebook, the plugin works fine for the admin of the page ( the same that has grantet access to facebook ) but for the rest of our users we get error:
OAuthException: (#200) The user hasn't authorized the application to perform this action

Is it possible to only have to give access to one facebok page/account for posting, or do i have to ask the other writers to do the same? ( the other writers do NOT have admin access to wordpress page ).

Or do you recommend other solutions for auto posting all new post to facebook page?