Configurator add in issue


I will start by saying I am a beginner so if this is a stupid question I apologise.

I have installed home assistant on a Raspberry Pi 3, can access it from a browser and from the android add. My chrome cast devices are added and working.

I would like to increase the integration using IFTTT, Philips Hue and some others as I get them. My understanding is I need to change the configuration.yaml file. I have downloaded configurator to do this and open the addin, it has some default script which includes a username and password.

What username and password is this as I have not yet setup up one in home assistant?
When I try and start configurator it tells me I need this?
Is the show script part of the addin or simple an example of what a script might look like?

Thanks again if this is obvious.