This note is called "the narrative". It can be used to provide the context around the business capability of your
product ("Authentication" features in this case) and its features that help to enable this capability.

Please note: While Cucumber allows you to capture a description
of each feature in the .feature file, Serenity/JS allows you to group those .feature
files in directories corresponding to "epics", "themes" or "business capabilities" of your system and provide
each one of those with additional context using this narrative.md file.

By the way: Did you notice that you can use markdown syntax to better express
your thoughts?