/** Conceals the membership. */
 public void conceal(GHUser u) throws IOException {
   root.retrieveWithAuth3("/orgs/" + login + "/public_members/" + u.getLogin(), null, "DELETE");
 }
 /** Publicizes the membership. */
 public void publicize(GHUser u) throws IOException {
   root.retrieveWithAuth3("/orgs/" + login + "/public_members/" + u.getLogin(), null, "PUT");
 }