Add model test usage

python/packages/autogen-core/docs/src/user-guide/agentchat-user-guide/tutorial/models.ipynb

@@ -42,7 +42,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -54,6 +54,33 @@
     ")"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "To test the model client, you can use the following code:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "CreateResult(finish_reason='stop', content='The capital of France is Paris.', usage=RequestUsage(prompt_tokens=15, completion_tokens=7), cached=False, logprobs=None)\n"
+     ]
+    }
+   ],
+   "source": [
+    "from autogen_core.components.models import UserMessage\n",
+    "\n",
+    "result = await opneai_model_client.create([UserMessage(content=\"What is the capital of France?\", source=\"user\")])\n",
+    "print(result)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},