diff --git a/src/main/java/envoy/client/Client.java b/src/main/java/envoy/client/Client.java
index f302a39..51ee5c0 100644
--- a/src/main/java/envoy/client/Client.java
+++ b/src/main/java/envoy/client/Client.java
@@ -17,6 +17,7 @@ import envoy.schema.Message;
 import envoy.schema.Message.MetaData.MessageState;
 import envoy.schema.Messages;
 import envoy.schema.ObjectFactory;
+import envoy.schema.User;
 import envoy.schema.Users;
 
 /**
@@ -26,6 +27,7 @@ import envoy.schema.Users;
  * 
  * @author Kai S. K. Engelbart
  * @author Maximilian Käfer
+ * @author Leon Hofmeister
  * @since Envoy 0.1
  */
 
@@ -34,14 +36,17 @@ public class Client {
 	private ObjectFactory	objectFactory	= new ObjectFactory();
 	private DatatypeFactory	datatypeFactory;
 	private Config			config;
+	private User user;
 
-	public Client(Config config) {
+	public Client(Config config, String username) {
 		this.config = config;
 		try {
 			datatypeFactory = DatatypeFactory.newInstance();
 		} catch (DatatypeConfigurationException e) {
 			e.printStackTrace();
 		}
+		user = getUser(username);
+		System.out.printf("Mein Name ist %s und ich habe die ID %d%n", user.getName(), user.getID());
 	}
 
 	/**
@@ -124,4 +129,23 @@ public class Client {
 		client.close();
 		return users;
 	}
+	
+	/**
+	 * Returns the user by name.
+	 * 
+	 * @param name - the name of the user
+	 * @return an user object
+	 * @since Envoy 0.1
+	 */
+	private User getUser(String name) {
+		javax.ws.rs.client.Client	client		= ClientBuilder.newClient();
+		WebTarget					target		= client
+			.target(String.format("%s:%d/envoy-server/rest/user/sender?name=" + name, config.getServer(), config.getPort()));
+		Response					response	= target.request("application/xml").get();
+		Users						users		= response.readEntity(Users.class);
+		System.out.println("Response code: " + response.getStatus());
+		response.close();
+		client.close();
+		return users.getUser().get(0);
+	}
 }
\ No newline at end of file
diff --git a/src/main/java/envoy/client/ui/ChatWindow.java b/src/main/java/envoy/client/ui/ChatWindow.java
index 6e4891d..8f71776 100644
--- a/src/main/java/envoy/client/ui/ChatWindow.java
+++ b/src/main/java/envoy/client/ui/ChatWindow.java
@@ -35,6 +35,7 @@ import envoy.schema.Users;
  * 
  * @author Kai S. K. Engelbart
  * @author Maximilian Käfer
+ * @author Leon Hofmeister
  * @since Envoy 0.1
  */
 public class ChatWindow extends JFrame {
@@ -44,11 +45,13 @@ public class ChatWindow extends JFrame {
 	private long	recipientID	= 0;
 	private JPanel	contentPane	= new JPanel();
 
-	private static Client client;
+	private Client client;
 
 	private DefaultListModel<String> messageListModel = new DefaultListModel<>();
 
-	public ChatWindow() {
+	public ChatWindow(Client client) {
+		this.client = client;
+		
 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 		setBounds(100, 100, 600, 800);
 		setTitle("Envoy");
@@ -212,35 +215,4 @@ public class ChatWindow extends JFrame {
 				+ getFirstTextContent(message) + "</span></html>");
 	}
 
-	public static void main(String[] args) {
-		Config config = new Config();
-		if (args.length > 0) {
-			config.load(args);
-		} else {
-			ClassLoader loader = Thread.currentThread().getContextClassLoader();
-			try {
-				Properties configProperties = new Properties();
-				configProperties.load(loader.getResourceAsStream("server.properties"));
-				config.load(configProperties);
-			} catch (IOException e) {
-				e.printStackTrace();
-			}
-		}
-
-		if(!config.isInitialized()) {
-			System.err.println("Server or port are not defined. Exiting...");
-			System.exit(1);
-		}
-		
-		client = new Client(config);
-
-		EventQueue.invokeLater(() -> {
-			try {
-				ChatWindow frame = new ChatWindow();
-				frame.setVisible(true);
-			} catch (Exception e) {
-				e.printStackTrace();
-			}
-		});
-	}
 }
\ No newline at end of file
diff --git a/src/main/java/envoy/client/ui/Startup.java b/src/main/java/envoy/client/ui/Startup.java
new file mode 100644
index 0000000..d2848a9
--- /dev/null
+++ b/src/main/java/envoy/client/ui/Startup.java
@@ -0,0 +1,63 @@
+package envoy.client.ui;
+
+import java.awt.EventQueue;
+import java.io.IOException;
+import java.util.Properties;
+
+import javax.swing.JOptionPane;
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.core.Response;
+
+import envoy.client.Client;
+import envoy.client.Config;
+
+/**
+ * Starts Envoy and sets a user.
+ * 
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>Startup.java</strong><br>
+ * Created: <strong>12 Oct 2019</strong><br>
+ * 
+ * @author Leon Hofmeister
+ * @author Maximilian K&auml;fer
+ * @since Envoy 0.1
+ */
+public class Startup {
+	
+	private static String userName;
+	
+	public static void main(String[] args) {
+		Config config = new Config();
+		if (args.length > 0) {
+			config.load(args);
+		} else {
+			ClassLoader loader = Thread.currentThread().getContextClassLoader();
+			try {
+				Properties configProperties = new Properties();
+				configProperties.load(loader.getResourceAsStream("server.properties"));
+				config.load(configProperties);
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+
+		if(!config.isInitialized()) {
+			System.err.println("Server or port are not defined. Exiting...");
+			System.exit(1);
+		}
+
+		userName = JOptionPane.showInputDialog("Please enter your username");
+		
+		Client client = new Client(config, userName);
+		
+		EventQueue.invokeLater(() -> {
+			try {
+				ChatWindow frame = new ChatWindow(client);
+				frame.setVisible(true);
+			} catch (Exception e) {
+				e.printStackTrace();
+			}
+		});
+	}
+}