¿ Chronograf username & password?

[integraciones-tiagora]

Dear team:
I downloaded and installed OpenNTI from https://github.com/jjess/open-nti.

This distribution includes Chronograf, that I pointed to using port 8888 with my browser. When this is done, a window pops up prompting me for username and password, which I do not know.

¿ which username/password combination should I use?

Your help will be greatly appreciated
Best regards

Rogelio