diff --git a/api/api.php b/api/api.php
new file mode 100644
index 0000000..d02cd72
--- /dev/null
+++ b/api/api.php
@@ -0,0 +1,13 @@
+<?php
+// API Main Library
+class gbAPI {
+    public $authRequired;
+
+    function __construct() {
+        define("APP_PATH", __DIR__ . "/..");
+
+        if ($this->authRequited) {
+            $this->checkAuth();
+        }
+    }
+}
\ No newline at end of file
diff --git a/api/setup/save.php b/api/setup/save.php
new file mode 100644
index 0000000..6328718
--- /dev/null
+++ b/api/setup/save.php
@@ -0,0 +1,3 @@
+<?php
+// Load Main Libary
+require "../api.php";
\ No newline at end of file
diff --git a/public/templates/entrys_frontend/entrys.html b/public/templates/entrys_frontend/entrys.html
index d752889..e69de29 100644
--- a/public/templates/entrys_frontend/entrys.html
+++ b/public/templates/entrys_frontend/entrys.html
@@ -1,38 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <link href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap" rel="stylesheet">
-  <script type="importmap">
-    {
-      "imports": {
-        "@material/web/": "https://esm.run/@material/web/"
-      }
-    }
-  </script>
-  <script type="module">
-    import '@material/web/all.js';
-    import {styles as typescaleStyles} from '@material/web/typography/md-typescale-styles.js';
-
-    document.adoptedStyleSheets.push(typescaleStyles.styleSheet);
-  </script>
-
-  <style>
-    body {
-        display: flex;
-        justify-content: center;
-        align-items: center;
-        text-align: center;
-    }
-  </style>
-</head>
-<body>
-    <div class="content">
-        <h1 class="md-typescale-display-medium">Hello!</h1>
-        <p>Welcome to your Guestbook! Enter here your prefered username and password.</p>
-        <md-filled-text-field label="Username" type="text"></md-filled-text-field><br><br>
-        <md-filled-text-field label="Password" type="password"></md-filled-text-field><br><br>
-        <md-filled-text-field label="Repeat Password" type="password"></md-filled-text-field><br><br>
-        <md-filled-button disabled>Save</md-filled-button>
-    </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/public/templates/setup/setup.html b/public/templates/setup/setup.html
index cb93c27..e64f264 100755
--- a/public/templates/setup/setup.html
+++ b/public/templates/setup/setup.html
@@ -1,11 +1,121 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
-    <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Setup</title>
+  <link href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap" rel="stylesheet">
+  <script type="importmap">
+    {
+      "imports": {
+        "@material/web/": "https://esm.run/@material/web/"
+      }
+    }
+  </script>
+  <script type="module">
+    import '@material/web/all.js';
+    import {styles as typescaleStyles} from '@material/web/typography/md-typescale-styles.js';
+
+    document.adoptedStyleSheets.push(typescaleStyles.styleSheet);
+  </script>
+
+  <title>Setup</title>
+
+  <style>
+    :root {
+        --md-sys-color-primary: rgb(58, 58, 255);
+    }
+
+    body {
+        display: flex;
+        justify-content: center;
+        align-items: center;
+        text-align: center;
+    }
+
+    p {
+        font-family: Verdana, Geneva, Tahoma, sans-serif;
+    }
+  </style>
 </head>
 <body>
-    <h1>La setup</h1>
+    <div class="content">
+        <h1 class="md-typescale-display-medium">Hello!</h1>
+        <p>Welcome to your Guestbook! Enter here your prefered username and password.</p>
+        <md-filled-text-field label="Username" type="text" id="setup-username"></md-filled-text-field><br><br>
+        <md-filled-text-field label="Password" type="password" id="setup-password"></md-filled-text-field><br><br>
+        <md-filled-text-field label="Repeat Password" type="password" id="setup-password-repeat"></md-filled-text-field><br><br>
+        <md-filled-button id="submit-button">Save</md-filled-button>
+    </div>
+    <md-dialog id="http-dialog">
+        <div slot="headline">
+            Warning
+        </div>
+        <form slot="content" method="dialog">
+            Your browser is using http instead of https. That means your connection is not encrypted and everyone in your network can read your credentials.
+        </form>
+        <div slot="actions">
+            <md-text-button id="http-dialog-close-button">I know what i'm doing!</md-text-button>
+        </div>
+    </md-dialog>
+    <md-dialog id="error-dialog">
+        <div slot="headline">
+            Error
+        </div>
+        <form slot="content" method="dialog" id="error-dialog-text">
+            
+        </form>
+        <div slot="actions">
+            <md-filled-button id="close-button">Close</md-filled-button>
+        </div>
+    </md-dialog>
+    <script>
+        if (window.location.protocol == "http:") {
+            document.getElementById("http-dialog").setAttribute("open", "");
+            document.getElementById("http-dialog-close-button").addEventListener("click", function() {
+                document.getElementById("http-dialog").removeAttribute("open");
+            });
+        }
+
+        document.getElementById("submit-button").addEventListener("click", function() {
+            checkSetup();
+        });
+
+        document.getElementById("close-button").addEventListener("click", function() {
+            document.getElementById("error-dialog").removeAttribute("open");
+        })
+
+        function checkSetup() {
+            const username = document.getElementById("setup-username").value;
+            const password = document.getElementById("setup-password").value;
+            const password_repeat = document.getElementById("setup-password-repeat").value;
+
+            // Check if Passwords match
+            if (password !== password_repeat) {
+                console.error("Passwords does not match");
+
+                document.getElementById("error-dialog-text").innerHTML = "Passwords does not match";
+                document.getElementById("error-dialog").setAttribute("open", "");
+            }
+
+            // Send data
+            fetch("/api/setup/save.php", {
+                method: "POST",
+                body: JSON.stringify({
+                    username: username,
+                    password: password
+                }),
+                headers: {
+                    "Content-type": "application/json; charset=UTF-8"
+                }
+            })
+            .then(response => response.json())
+            .then(data => function() {
+                if (data.status !== 200) {
+                    console.error("Server returned following message: " + data.error);
+
+                    document.getElementById("error-dialog-text").innerHTML = data.display_error;
+                    document.getElementById("error-dialog").setAttribute("open", "");
+                }
+            })
+        }
+    </script>
 </body>
 </html>
\ No newline at end of file