Pass Client & ClientListener through all controllers

ChatApp/app/src/main/java/client/ClientLogin.java

@@ -7,6 +7,7 @@ import javafx.scene.control.TextField;
 import javafx.stage.Stage;
 import client.ClientGui;
 import java.io.IOException;
+import java.net.InetSocketAddress;
 
 import static utilities.FxUtilities.centerStage;
 
@@ -16,11 +17,14 @@ public class ClientLogin {
 
     @FXML
     private void login() throws IOException {
-        if(usernameField.getText().isEmpty()) {
+        String username = usernameField.getText();
+        if(username.isEmpty()) {
             return;
         }
         var loader = new FXMLLoader(getClass().getResource("/client/clientLoading.fxml"));
+        Client client = new Client(new InetSocketAddress("localhost", 6665), loader.getController(), username);
         loader.load();
+        ((ClientLoading) loader.getController()).setClient(client);
         Stage stage = (Stage) usernameField.getScene().getWindow();
         stage.setScene(new Scene(loader.getRoot(), 800, 600));
         centerStage(stage);