Simplified Excels with MS Graph API

Introduction
Today I want to share with you a way to handle Excel files (. xlsx) with the help of the Microsoft Graph API.
I came across this solution during my last job as my team was our method for treating data. To be clear we needed to read data from excel file coming from a macro during this transition phase I needed to have a fast and temporary.
I wanted to write this article because I haven't found any covering this solution. I will firstly get you started with the API quickly, then we'll see a real world application.
Stick to the end there is a bonus paragraph.
Now let's get started.