ObtainU2fRequestTask

ObtainU2fRequestTask.TYPE_ENROLL
ObtainU2fRequestTask.TYPE_SIGN

ObtainU2fRequestTask task = ObtainU2fRequestTask.runTask(new TaskListener() {
    @Override
    public void onTaskSuccess() {
    }

    @Override
    public void onTaskError(String errorMessage, int errorCode) {
    }
}, serverUrl, username, u2fRequestType);