diff --git a/guide/03-the-gis/working-with-different-authentication-schemes.ipynb b/guide/03-the-gis/working-with-different-authentication-schemes.ipynb
index 25768c629d..4b623a7462 100644
--- a/guide/03-the-gis/working-with-different-authentication-schemes.ipynb
+++ b/guide/03-the-gis/working-with-different-authentication-schemes.ipynb
@@ -453,6 +453,96 @@
     "The recommended suggestion for non-interactive login scripts is to use the built-in identity provider instead of SAML."
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## App Authentication using API Key Credentials"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "This workflow demonstrates how to use an Administrative connection to register a new Application, define its security boundaries (Privileges, Expiration, and Referers), and subsequently initialize a restricted GIS session using the generated `client_id`"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### 1. Establish Administrative Connection\n",
+    "Before creating credentials, you must connect to your Portal as an Administrator. This \"Master Connection\" is used to manage the lifecycle of your application identities."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from arcgis.gis import GIS\n",
+    "\n",
+    "# Initialize the Admin session\n",
+    "gis_admin = GIS(url=\"your_organization_url\", username=\"your_admin_username\", password=\"your_admin_ password\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### 2. Creating the App Identity\n",
+    "\n",
+    "The `developer_credentials.create` is a method of the `DeveloperCredentialManager` class that registers the app. Here, we define the \"Security Perimeter\" of the application before it ever logs in."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from arcgis.gis.admin import TokenPrivilege\n",
+    "import datetime as dt\n",
+    "\n",
+    "# Define the restricted sandbox\n",
+    "apiKeyCredentials = gis_admin.admin.developer_credentials.create(\n",
+    "    title=\"API Key Credentials\",\n",
+    "    privileges=[TokenPrivilege.PORTAL_USER_VIEWORGUSERS], # Restricted Scope\n",
+    "    expiration=dt.datetime(2026, 3, 8, 11, 29, 22),      # Time-limited\n",
+    "    referers=[\"https://example.com\"]                     # Domain-locked\n",
+    ")\n",
+    "\n",
+    "# Retrieve the Client ID (The App's Username) and the Client Secret (The App's Password)\n",
+    "client_id = apiKeyCredentials.app_info['client_id']"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### 3. Initializing the App Session (App Authentication)\n",
+    "\n",
+    "Now, we initialize a new GIS object using the `client_id`. This session is App-authenticated. It does not represent the Admin; it represents the \"API Key Credentials\" app itself."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Authenticate as the App\n",
+    "gis_app = GIS(url=\"https://arcgis.com\", client_id=client_id)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "After running the above cell, it will ask for a token. A browser window will be open up, copy the token from the browser"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -655,7 +745,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.13.5"
+   "version": "3.13.12"
   },
   "toc": {
    "base_numbering": 1,