code: public void addCollaborator(String appName, String collaborator) {
          connection.execute(new SharingAdd(appName, collaborator), apiKey);
      }
docs: Add a collaborator to an app.
  @param appName App name. See {@link #listApps} for a list of apps that can be used.
  @param collaborator Username of the collaborator to add. This is usually in the form of "user@company.com".