WebHost with MSI (no client credentials)

BuildWebHostWithMSI.cs

public static IWebHost BuildWebHost(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
        .UseStartup<Startup>()
        .ConfigureAppConfiguration((builderContext, config) =>
        {
            var builtConfig = config.Build();
            var vaultUrl = $"https://{buiItConfig["VaultName"]}.vault.azure.net/"; 
            config.AddAzureKeyVault(vaultUrl); 
        });