2 little hotfixes

Author: stho32

Source/LocalNetAppChat/LocalNetAppChat.Domain/Clientside/ServerApis/LnacClient.cs

@@ -76,8 +76,19 @@ public async Task SendFile(string filePath)
     public async Task<string[]> GetServerFiles()
     {
         var result = await _apiAccessor.GetAsync("listallfiles");
-        var receivedFilesList = JsonSerializer.Deserialize<string[]>(result);
-        return receivedFilesList ?? Array.Empty<string>();
+        
+        try
+        {
+            var receivedFilesList = JsonSerializer.Deserialize<string[]>(result);
+            return receivedFilesList ?? Array.Empty<string>();
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"Received {result}, which is not valid JSON");
+            Console.WriteLine(ex.Message);
+        }
+
+        return Array.Empty<string>();
     }
 
     public async Task DownloadFile(string filename, string targetPath)

Source/LocalNetAppChat/LocalNetAppChat.Server/Program.cs

@@ -23,7 +23,7 @@
 }
 
 var serverKey = parser.TryGetOptionWithValue<string>("--key");
-var accessControl = new KeyBasedAccessControl(serverKey);
+var accessControl = new KeyBasedAccessControl(serverKey??string.Empty);
 
 var messagingServiceProvider = new MessagingServiceProvider(
     accessControl,