C# Shopify API connection with a token

Job ID: 32839634

Budget: €30 – €250 EUR

Hi,
I have an issue on a C# application connected to Shopify via API.
This application was working and is working at the moment on several shops.
But I am unable to connect more shops with these apikey / secretkey.
Maybe I have to change the connection mode with a token ?
Would you be able to fix the C# code and connexion process ?
Kind regards.
Related categories: C# Programming OAuth API Shopify Development