Added user signup and improved error handling

Program.cs

@@ -4,27 +4,58 @@ using System.Text;
 using EFBTracker.Tracking;
 using EFBTracker.Mongo;
 
-bool done = false;
+string email;
+
+while (true)
+{
+    try
+    {
+        Console.Write("Please enter your AutoRouter E-Mail: ");
+        email = Console.ReadLine().Trim().ToLower();
+
+        if (email.Count(x => (x == '@')) == 1)
+        {
+            break;
+        }
+
+        Console.Clear();
+        Console.WriteLine("Please enter a valid email!");
+    }
+    catch (System.Exception ex)
+    {
+        
+    }
+}
+
 int listenPort = 49003;
+
 using(UdpClient listener = new UdpClient(listenPort))
 {
+    try
+    {
         IPEndPoint listenEndPoint = new IPEndPoint(2130706433, listenPort);
-    while(!done)
+        while(true)
         {
             byte[] receivedData = listener.Receive(ref listenEndPoint);
 
             Console.Clear();
-        Console.WriteLine("Received broadcast message from client {0}", listenEndPoint.ToString());
+            Console.Write($"Currently logged in as {email} \n \n");
-
+            Console.Write("Receiving broadcast message from {0} \n", listenEndPoint.ToString());
-        Console.WriteLine("Decoded data is:");
+            Console.Write("Decoded data is: \n");
 
             Packet[]? data = Packet.ReadPackets(receivedData);
 
             if (data != null)
             {
                 SimPosition position = new SimPosition(data);
-            Console.WriteLine($"Latitude: {position.Latitude} Longitude: {position.Longitude} Altitude: {position.Altitude}");
+                await Mongo.UploadSimPosition(email, position);
-            await Mongo.UploadSimPosition("example@example.com", position);
+                Console.Write($"Latitude: {position.Latitude} Longitude: {position.Longitude} Altitude: {position.Altitude} \n");
             }
         }
+    }
+    catch (System.Exception ex)
+    {
+        Console.WriteLine(ex.Message);
+        Console.ReadLine();
+    }
 }