user_data['username'] = split(user.user_id)[1]

	username := split(user.user_id)[1]
	user_data['username'] = username

		_, _ := self.call(http.Method.put, 'profile/$user_id/displayname', name_data.str()) ?

		_, _ := self.call(http.Method.put, 'profile/$username/displayname', name_data.str()) ?