There are 3 resource fields that hold pertinent user info - you will have to decide which is the most appropriate for your needs.
[[*createdby]] - the user who created the resource.
[[*editedby]] - the user who last edited the resource.
[[*publishedby]] - the user who last published the resource.
These all output user IDs though - to get the fullname you’ll have to use the ’userinfo’ output filter.
[[*editedby:userinfo=`fullname`]]
That should work I think.