diff --git a/src/HomeAutio.Mqtt.GoogleHome/.gitignore b/src/HomeAutio.Mqtt.GoogleHome/.gitignore
index 4ac2506..ba14cd0 100644
--- a/src/HomeAutio.Mqtt.GoogleHome/.gitignore
+++ b/src/HomeAutio.Mqtt.GoogleHome/.gitignore
@@ -1,3 +1,4 @@
-tempkey.rsa
-tokens.json
-appsettings.Development.json
+config/tempkey.rsa
+config/tokens.json
+config/googleDevices.json
+appsettings.*.json
diff --git a/src/HomeAutio.Mqtt.GoogleHome/GoogleHomeGraphClient.cs b/src/HomeAutio.Mqtt.GoogleHome/GoogleHomeGraphClient.cs
index 4d164fe..21969af 100644
--- a/src/HomeAutio.Mqtt.GoogleHome/GoogleHomeGraphClient.cs
+++ b/src/HomeAutio.Mqtt.GoogleHome/GoogleHomeGraphClient.cs
@@ -58,6 +58,13 @@ public GoogleHomeGraphClient(
         /// <returns>An awaitable <see cref="Task"/>.</returns>
         public async Task RequestSyncAsync()
         {
+            // If no api key has been provided, don't attempt to call
+            if (string.IsNullOrEmpty(_googleHomeGraphApiKey))
+            {
+                _log.LogWarning("REQUEST_SYNC triggered but Google Home Graph API was blank");
+                return;
+            }
+
             var request = new Request
             {
                 AgentUserId = _agentUserId
@@ -84,6 +91,13 @@ public async Task RequestSyncAsync()
         /// <returns>An awaitable <see cref="Task"/>.</returns>
         public async Task SendUpdatesAsync(IList<Models.State.Device> devices, IDictionary<string, string> stateCache)
         {
+            // If no service account has been provided, don't attempt to call
+            if (_serviceAccount == null)
+            {
+                _log.LogWarning("WillReportState triggered but Google Home Graph serviceAccountFile setting was blank, or the file didn't exist");
+                return;
+            }
+
             // Ensure access token is available
             if (_accessToken == null || _accessToken.ExpiresAt <= DateTime.Now.AddMinutes(-1))
             {
diff --git a/src/HomeAutio.Mqtt.GoogleHome/MqttService.cs b/src/HomeAutio.Mqtt.GoogleHome/MqttService.cs
index 66338d1..84f1359 100644
--- a/src/HomeAutio.Mqtt.GoogleHome/MqttService.cs
+++ b/src/HomeAutio.Mqtt.GoogleHome/MqttService.cs
@@ -86,25 +86,27 @@ protected override Task StopServiceAsync(CancellationToken cancellationToken)
         /// <inheritdoc />
         protected override void Mqtt_MqttMsgPublishReceived(object sender, MqttApplicationMessageReceivedEventArgs e)
         {
-            if (_stateCache.ContainsKey(e.ApplicationMessage.Topic))
+            if (e.ApplicationMessage.Topic == TopicRoot + "REQUEST_SYNC")
+            {
+                // Handle REQUEST_SYNC
+                _googleHomeGraphClient.RequestSyncAsync()
+                    .GetAwaiter().GetResult();
+            }
+            else if (_stateCache.ContainsKey(e.ApplicationMessage.Topic))
             {
                 _stateCache[e.ApplicationMessage.Topic] = e.ApplicationMessage.ConvertPayloadToString();
 
-                // Handle reportState
-                if (_googleHomeGraphClient != null)
+                // Identify devices that handle reportState
+                var devices = _deviceConfig.Values
+                    .Where(x => x.WillReportState)
+                    .Where(x => x.Traits.Any(trait => trait.State.Values.Any(state => state.Topic == e.ApplicationMessage.Topic)))
+                    .ToList();
+
+                // Send updated to Google Home Graph
+                if (devices.Count() > 0)
                 {
-                    // Identify devices that handle reportState
-                    var devices = _deviceConfig.Values
-                        .Where(x => x.WillReportState)
-                        .Where(x => x.Traits.Any(trait => trait.State.Values.Any(state => state.Topic == e.ApplicationMessage.Topic)))
-                        .ToList();
-
-                    // Send updated to Google Home Graph
-                    if (devices.Count() > 0)
-                    {
-                        _googleHomeGraphClient.SendUpdatesAsync(devices, _stateCache)
-                            .GetAwaiter().GetResult();
-                    }
+                    _googleHomeGraphClient.SendUpdatesAsync(devices, _stateCache)
+                        .GetAwaiter().GetResult();
                 }
             }
         }
diff --git a/src/HomeAutio.Mqtt.GoogleHome/Startup.cs b/src/HomeAutio.Mqtt.GoogleHome/Startup.cs
index fb1f4a3..5023a3b 100644
--- a/src/HomeAutio.Mqtt.GoogleHome/Startup.cs
+++ b/src/HomeAutio.Mqtt.GoogleHome/Startup.cs
@@ -82,20 +82,20 @@ public void ConfigureServices(IServiceCollection services)
             // Google Home Graph client
             services.AddSingleton<GoogleHomeGraphClient>(serviceProvider =>
             {
+                ServiceAccount serviceAccount = null;
                 var googleHomeServiceAccountFile = Configuration.GetValue<string>("googleHomeGraph:serviceAccountFile");
                 if (!string.IsNullOrEmpty(googleHomeServiceAccountFile) && File.Exists(googleHomeServiceAccountFile))
                 {
                     var googleHomeServiceAccountFileContents = File.ReadAllText(googleHomeServiceAccountFile);
-                    var serviceAccount = JsonConvert.DeserializeObject<ServiceAccount>(googleHomeServiceAccountFileContents);
-                    return new GoogleHomeGraphClient(
-                        serviceProvider.GetRequiredService<ILogger<GoogleHomeGraphClient>>(),
-                        serviceProvider.GetRequiredService<IHttpClientFactory>(),
-                        serviceAccount,
-                        Configuration.GetValue<string>("googleHomeGraph:agentUserId"),
-                        Configuration.GetValue<string>("googleHomeGraph:apiKey"));
+                    serviceAccount = JsonConvert.DeserializeObject<ServiceAccount>(googleHomeServiceAccountFileContents);
                 }
 
-                return null;
+                return new GoogleHomeGraphClient(
+                    serviceProvider.GetRequiredService<ILogger<GoogleHomeGraphClient>>(),
+                    serviceProvider.GetRequiredService<IHttpClientFactory>(),
+                    serviceAccount,
+                    Configuration.GetValue<string>("googleHomeGraph:agentUserId"),
+                    Configuration.GetValue<string>("googleHomeGraph:apiKey"));
             });
 
             // Setup client
@@ -114,7 +114,7 @@ public void ConfigureServices(IServiceCollection services)
                     serviceProvider.GetRequiredService<DeviceConfiguration>(),
                     serviceProvider.GetRequiredService<StateCache>(),
                     serviceProvider.GetRequiredService<IMessageHub>(),
-                    serviceProvider.GetService<GoogleHomeGraphClient>(),
+                    serviceProvider.GetRequiredService<GoogleHomeGraphClient>(),
                     brokerSettings);
             });