Method: Check for the existence of a slug.

Method: Get the slug for a given group ID.

Method: Check whether a given group has any members.

Method: Get the ID of a group by the group’s slug.

Method: Get whether a group exists for an old slug.

Method: Get IDs of users with outstanding invites to a given group from a specified user.

Method: Get a list of a user’s groups, filtered by a search string.

Method: Checks whether the current user can know the group exists.

Method: Get whether a group exists for a given slug.

Method: Checks whether the logged-in user is a member of the group.