Unable to manual trigger my Azure Timer Trigger using httpclient post request

Question

https://learn.microsoft.com/en-us/azure/azure-functions/functions-manually-run-non-http

I am trying to manual trigger my Azure Timer function App created in 2.0 and developed in .net core 2.0.

When I try to hit the url I get 403 error.

apikey I pass is picked from :

Answer 1

As the article you provided, you need to use _master key under Manage and Host key