code: function isAdmin(options, username) {
  	return (options.configParams.get("orion.auth.user.creation") || "").split(",").some(function(user) {
  		return user === username;
  	});
  }
docs: Checks if the 'admin' user has been enabled in the server configuration
  @param {?} options The map of server options
  @see https://wiki.eclipse.org/Orion/Server_admin_guide#Allowing_users_to_create_accounts
  @since 18.0