You can create users from the Users and Groups screen.
Remote users and groups are those for whom authentication is delegated to an LDAP server. Note that remote users and groups can be added to local groups, but local users and groups cannot be added to remote groups.
When you create a user, make sure you grant him/her access rights on repository documents, either by inserting this user into a group, or directly. If a user connects to the repository without access rights, he cannot see any documents in the browser.