question

I've just started converting some existing cloudscript to azure functions. As a test I'm starting with a simple function that we currently use to add a daily bonus key right now during development( instead of waiting for 24 hrs), works great currently:

handlers.AddDailyBonus = function(args, context) {  server.AddUserVirtualCurrency({ "Amount": 1, "PlayFabId" : currentPlayerId, "VirtualCurrency": "DB"}); }

I started with the basic helloworld tutorial and uploaded it to my azure instance, and that operates correctly, so I know the basics of connecting to the azure functions is working. Following various tutorials and sample code I've arrived at the following to duplicate the above cloudscript:

[FunctionName("AddDailyBonus")]
        public static async Task<dynamic> Run(
            [HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequest req,
            ILogger log)
        {
            FunctionExecutionContext<dynamic> context = JsonConvert.DeserializeObject<FunctionExecutionContext<dynamic>>(await req.ReadAsStringAsync());

            dynamic args = context.FunctionArgument;
/*
            var message = $"Hello {context.CallerEntityProfile.Lineage.MasterPlayerAccountId}!";
            log.LogInformation(message);

            dynamic inputValue = null;
            if (args != null && args["inputValue"] != null)
            {
                inputValue = args["inputValue"];
            }

            log.LogDebug($"HelloWorld: {new { input = inputValue} }");
*/
 
       var apiSettings = new PlayFab.PlayFabApiSettings () {
            TitleId = context.TitleAuthenticationContext.Id
        };

        PlayFab.PlayFabAuthenticationContext titlecontext = new PlayFab.PlayFabAuthenticationContext ();
            titlecontext.EntityToken = context.TitleAuthenticationContext.EntityToken;

       var request = new PlayFab.ServerModels.AddUserVirtualCurrencyRequest();
            request.Amount  = 1;
            request.PlayFabId = context.CallerEntityProfile.Lineage.MasterPlayerAccountId;
            request.VirtualCurrency = "DB";
    
      var serverApi = new PlayFab.PlayFabServerInstanceAPI(apiSettings, titlecontext); 
      
       var result = await serverApi.AddUserVirtualCurrencyAsync(request);

       return result; //new { messageValue = message };  

        }
    }

you can see where I've commented out the original helloworld function body. I've also switched from anonymous to function, and removed the "get" path.

When I attempt to call this from cloudscript, I get a 400 with 1473 error code, and I've tried a variety of options. As far as I can tell my other azure settings are correct, i.e. the title ID and dev key are in the host json and I can see them in my azure portal.

Any help would be greatly appreciated, feels like I'm missing something basic. Also, the various examples and the sample at https://github.com/PlayFab/PlayFab-Samples/blob/master/Samples/CSharp/AzureFunctions/ExampleFunctions/Handlers.cs vary enough that I'm not sure which is correct. I could not get the handlers.cs version to work correctly, probably something basic in my project settings.