I have a function app, the app settings has several different PATs
One of the function is an HTTP trigger, the request body will contain a specific name
and that name should be used to retrieve the corresponding PAT from app settings

I have tried Environment.GetEnvironmentVariable, this doesnt seem to read from app settings at all

I have tried

var configuration = builder.GetContext().Configuration;
var pat = configuration[$"{name}_PAT"];

this was a struggle because the {name} is only available after the POST request comes in, and configuration read the app settings in startup.cs, which is before the function getting triggered

I also cant use configuration after the request had come in because of the {name} and public abstract void Configure(IFunctionsHostBuilder builder) from FunctionsStartup doesn’t have any forms that would take a string that’s needed for the {name}