Add members from Google Group

gistfile1.txt

function addMembersFromGoogleGroup()
{
  var group = GroupsApp.getGroupByEmail("example@googlegroups.com");
  var users = group.getUsers();
  var board = new Trellinator().board("My Board");
  
  for (var i = 0; i < users.length; i++)
    board.inviteMemberByEmail(users[i].getEmail());
}