Null check instead of initilizing empty work

MistoxServer/Server/MistoxServer.cs

@@ -22,9 +22,6 @@ namespace Mistox.Server {
         public MistoxServer(IPEndPoint ListenerAddress, string serverName) {
             ServerName = serverName;
             Listener = new ServerListener(ListenerAddress, this);
-            onUserConnected += (_) => {};
-            onDataReceived += (_, _) => {};
-            onUserDisconnected += (_) => {};
             Console.WriteLine( "The Server is initilized and waiting for clients to connect at port : " + ListenerAddress.Port );
         }
 
@@ -75,13 +72,13 @@ namespace Mistox.Server {
 // Events
 /////////////////////////////
 
-        public event Action<ServerConnection> onUserConnected;
+        public event Action<ServerConnection>? onUserConnected;
         public void InvokeUserConnected( ServerConnection user ){
             Connections[user.UserName] = user;
             onUserConnected?.Invoke( user );
         }
 
-        public event Action<ServerConnection, object> onDataReceived;
+        public event Action<ServerConnection, object>? onDataReceived;
         public void InvokeDataReceived( ServerConnection user, dynamic data ){
             switch (data) {
                 case UserAuthPacket packet when !user.IsAuthenticated:
@@ -104,7 +101,7 @@ namespace Mistox.Server {
             }
         }
 
-        public event Action<ServerConnection> onUserDisconnected;
+        public event Action<ServerConnection>? onUserDisconnected;
         public void InvokeUserDisconnected( ServerConnection user ){
             Connections.Remove(user.UserName, out _);
             onUserDisconnected?.Invoke( user );