Suggestion: add warning when ASA service is not connected or offline

[dudziakl]

I put it here because it took me a few hours to find out why it is not working.

Application did not provide valid credentials and therefore could not authenticate

This error message doesn't mean that you have copied the wrong Account Id or Access Key from your Azure Spatial Anchor page. It also happens when app cannot connect to Azure services for example when InternetClient or InternetNetworkClientServer Capabilities are missing in Projects Publishing Settings.