add missing iam policy binding

Vertex_AI_Chat.ipynb

@@ -133,14 +133,38 @@
       },
       "outputs": [],
       "source": [
-        "#@markdown ####  Check authenticated user\n",
+        "#@markdown ####  Check authenticated user and project\n",
         "current_user = !gcloud auth list \\\n",
         "  --filter=\"status:ACTIVE\" \\\n",
         "  --format=\"value(account)\" \\\n",
         "  --quiet\n",
         "\n",
         "current_user = current_user[0]\n",
-        "print(f\"Current user: {current_user}\")"
+        "print(f\"Current user: {current_user}\")\n",
+        "\n",
+        "project_number = !gcloud projects list \\\n",
+        "  --filter=\"projectId:{project_id}\" \\\n",
+        "  --format=\"value(PROJECT_NUMBER)\" \\\n",
+        "  --quiet\n",
+        "\n",
+        "project_number = project_number[0]\n",
+        "print(f\"Project number: {project_number}\")"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "#@markdown ####  Add IAM policy binding for default compute service account\n",
+        "\n",
+        "!gcloud projects add-iam-policy-binding \"{project_id}\" \\\n",
+        "  --member=\"serviceAccount:{project_number}[email protected]\" \\\n",
+        "  --role=\"roles/aiplatform.user\" \\\n",
+        "  --quiet\n",
+        "\n",
+        "print(\"☑️ Done\")"
       ]
     },
     {