diff -r 559da0ee9bb7 -r 65d5a0ca49ae src/java/de/uapcore/lightpit/entities/User.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java/de/uapcore/lightpit/entities/User.java	Sun Apr 08 15:34:11 2018 +0200
@@ -0,0 +1,92 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ * 
+ * Copyright 2018 Mike Becker. All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+package de.uapcore.lightpit.entities;
+
+import java.util.Optional;
+
+public final class User {
+    
+    public static final int ANONYMOUS_USERID = -1;
+    
+    private int userID;
+    private String username;
+    private Optional<String> givenname;
+    private Optional<String> lastname;
+
+    public int getUserID() {
+        return userID;
+    }
+
+    public void setUserID(int userID) {
+        this.userID = userID;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public Optional<String> getGivenname() {
+        return givenname;
+    }
+
+    public void setGivenname(Optional<String> givenname) {
+        this.givenname = givenname;
+    }
+
+    public Optional<String> getLastname() {
+        return lastname;
+    }
+
+    public void setLastname(Optional<String> lastname) {
+        this.lastname = lastname;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 3;
+        hash = 41 * hash + this.userID;
+        return hash;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null || getClass() != obj.getClass()) {
+            return false;
+        } else {
+            return this.userID == ((User) obj).userID;
+        }
+    }    
+}