update docs

cookbook/liteLLM_VertextAI_Example.ipynb

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+{
+ "cells": [
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Using Google Palm (VertexAI) with liteLLM \n",
+    "### chat-bison & chat-bison@001"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "!pip install litellm==0.1.379 # use 0.1.379 or after for VertexAI"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Set VertexAI Configs\n",
+    "Vertex AI requires the following:\n",
+    "* `vertex_project` - Your Project ID\n",
+    "* `vertex_location` - Your Vertex AI region\n",
+    "Both can be found on: https://console.cloud.google.com/\n",
+    "\n",
+    "VertexAI uses Application Default Credentials, see https://cloud.google.com/docs/authentication/external/set-up-adc for more information on setting this up\n",
+    "\n",
+    "NOTE: VertexAI requires you to set `application_default_credentials.json` \n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# set you Vertex AI configs\n",
+    "import litellm\n",
+    "from litellm import embedding, completion\n",
+    "\n",
+    "litellm.vertex_project = \"hardy-device-386718\"\n",
+    "litellm.vertex_location = \"us-central1\""
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Call VertexAI using liteLLM"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "user_message = \"what is liteLLM \"\n",
+    "messages = [{ \"content\": user_message,\"role\": \"user\"}]\n",
+    "\n",
+    "# chat-bison or chat-bison@001 supported by Vertex AI (As of Aug 2023)\n",
+    "response = completion(model=\"chat-bison\", messages=messages)\n",
+    "print(response)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
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+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.6"
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+}