The "login-group" command:

Run various subcommands to manage login-group related settings of the open repository or of the repository identified by the -R or --repository option.

fossil login-group

Show the login-group to which the repository belongs.

fossil login-group join ?--name NAME?

Add this repository to login group to which REPO belongs, or creates a new login group between itself and REPO if REPO does not already belong to a login-group. When creating a new login-group, the name of the new group is determined by the "--name" option.

fossil login-group leave

Takes the repository out of whatever login group it is currently a part of.

Options valid for all subcommands:

-R|--repository REPO

Run commands on repository REPO

About Login Groups:

A login-group is a set of repositories that share user credentials. If a user is logged into one member of the group, then that user can access any other group member as long as they have an entry in the USER table of that member. If a user changes their password using web interface, their password is also automatically changed in every other member of the login group.