https://learn.microsoft.com/en-us/entra/external-id/customers/how-to-register-ciam-app?tabs=webapi&preserve-view=true https://learn.microsoft.com/en-us/entra/external-id/customers/tutorial-protect-web-api-dotnet-core-build-app https://learn.microsoft.com/en-us/entra/external-id/customers/tutorial-protect-web-api-dotnet-core-test-api