code: public static BoxUser.Info createAppUser(BoxAPIConnection api, String name,
          CreateUserParams params) {
  
          params.setIsPlatformAccessOnly(true);
          return createEnterpriseUser(api, null, name, params);
      }
docs: Provisions a new app user in an enterprise with additional user information using Box Developer Edition.
  @param  api    the API connection to be used by the created user.
  @param  name   the name of the user.
  @param  params additional user information.
  @return        the created user's info.