Azure Function Environment Variables
Assuming you are using targeting the ~2 runtime for your Azure Functions you can access your configuration values through:
log.Info(Environment.GetEnvironmentVariable("AzureWebJobsStorage", EnvironmentVariableTarget.Process));
Those environmental variables work when you are testing your function locally. However, when you deploy to the Azure Function Portal, you need to setup your variables using their built-in system to handle Environmental Variables.
Copy and past your key-values into the sections that I highlighted in the image below.
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