Connect to Etsy API using OAuth2 with PHP

I want to access my orders on Etsy using the Etsy API. This requires OAuth2 login, which I would like you to program for me.

Please take a look at: https://oauth2-client.thephpleague.com which can apparently be used in combination with https://packagist.org/packages/startz/oauth2-etsy

The script you create for me should run on my own web server and allow me to login to my Etsy account using OAuth2, I will then use my existing PHP script to extract the order details I need from Etsy API.

Ideally you would create the script in PHP so I can connect it with my existing code.

OAuth2 requires refreshing token, which I do not understand. Your script must keep the connection alive as I require this connection every day.

There is no urgency on this project and I require only the bare-bones; your script should work on my webserver, should connect to Etsy via the API, refresh the token when required, I'll do the rest.