def members(refresh = false)
      @members = nil if refresh
      @members ||= safe_members.sort{|a,b| a.to_s <=> b.to_s}
    end
def members(refresh = false)
      @members = nil if refresh
      @members ||= safe_members.sort{|a,b| a.to_s <=> b.to_s}
    end
Gets a list of all of the member users for this group.  (Read-only)