Groupie Trackers is a website that manipulates data in order to create different visualizations.
It will be given an API that consists of four parts: artists, locations, dates, and relation.
The first part, artists, will contain information about some bands and artists like their name(s), image, in which year they began their activity, the date of their first album, and the members.
The second part, locations, will contain their last and/or upcoming concert locations.
The third part, dates, will contain their last and/or upcoming concert dates.
The fourth part, relation, will link all the other parts and will contain the link between all the other parts.
It is recommended to have test files for unit testing.
Allowed packages for this project are only the standard Go packages.

Explore how to manipulate artist, location, date, and relation data from an API to create visualizations using Go. Learn to handle information regarding bands/artists, concert locations, concert dates, and their relationships, while utilizing standard Go packages and implementing unit testing.