def check_member(m)
      potential_members = self.class::MEMBER_CLASS.map_all_ids_to(:name, api: @api)
      if m.to_s =~ /^\d+$/
        return { id: m.to_i, name: potential_members[m] } if potential_members.key?(m.to_i)
      else
        return { name: m, id: potential_members.invert[m] } if potential_members.value?(m)
      end
      raise JSS::NoSuchItemError, "No #{self.class::MEMBER_CLASS::RSRC_OBJECT_KEY} matching '#{m}' in the JSS."
    end
def check_member(m)
      potential_members = self.class::MEMBER_CLASS.map_all_ids_to(:name, api: @api)
      if m.to_s =~ /^\d+$/
        return { id: m.to_i, name: potential_members[m] } if potential_members.key?(m.to_i)
      else
        return { name: m, id: potential_members.invert[m] } if potential_members.value?(m)
      end
      raise JSS::NoSuchItemError, "No #{self.class::MEMBER_CLASS::RSRC_OBJECT_KEY} matching '#{m}' in the JSS."
    end
Check that a potential group member is valid in the JSS.
 Arg must be an id or name.
 An exception is raised if the device doesn't exist.

 @return [Hash{:id=>Integer,:name=>String}] the valid id and name