Weaviate: adding auth example + fixing spelling in ReadME (#8939)

Added basic auth example to Weaviate notebook @baskaryan

docs/extras/integrations/vectorstores/weaviate.ipynb

@@ -81,17 +81,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 21,
    "id": "53b7ce2d-3c09-4d1c-b66b-5769ce6746ae",
    "metadata": {},
    "outputs": [],
    "source": [
-    "os.environ[\"WEAVIATE_API_KEY\"] = getpass.getpass(\"WEAVIATE_API_KEY:\")"
+    "os.environ[\"WEAVIATE_API_KEY\"] = getpass.getpass(\"WEAVIATE_API_KEY:\")\n",
+    "WEAVIATE_API_KEY = os.environ[\"WEAVIATE_API_KEY\"]"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 7,
    "id": "aac9563e",
    "metadata": {
     "tags": []
@@ -106,7 +107,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 12,
    "id": "a3c3999a",
    "metadata": {},
    "outputs": [],
@@ -123,7 +124,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 14,
    "id": "21e9e528",
    "metadata": {},
    "outputs": [],
@@ -133,7 +134,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 15,
    "id": "b4170176",
    "metadata": {},
    "outputs": [],
@@ -144,7 +145,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 16,
    "id": "ecf3b890",
    "metadata": {},
    "outputs": [
@@ -166,6 +167,53 @@
     "print(docs[0].page_content)"
    ]
   },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "id": "7826d0ea",
+   "metadata": {},
+   "source": [
+    "## Authentication"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "13989a7c",
+   "metadata": {},
+   "source": [
+    "Weaviate instances have authentication enabled by default. You can use either a username/password combination or API key.  "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 23,
+   "id": "f6604f1d",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "<langchain.vectorstores.weaviate.Weaviate object at 0x107f46550>\n"
+     ]
+    }
+   ],
+   "source": [
+    "import weaviate\n",
+    "\n",
+    "client = weaviate.Client(url=WEAVIATE_URL, auth_client_secret=weaviate.AuthApiKey(WEAVIATE_API_KEY))\n",
+    "\n",
+    "# client = weaviate.Client(\n",
+    "#     url=WEAVIATE_URL,\n",
+    "#     auth_client_secret=weaviate.AuthClientPassword(\n",
+    "#         username = \"WCS_USERNAME\",  # Replace w/ your WCS username\n",
+    "#         password = \"WCS_PASSWORD\",  # Replace w/ your WCS password\n",
+    "#     ),\n",
+    "# )\n",
+    "\n",
+    "vectorstore = Weaviate.from_documents(documents, embeddings, client=client, by_text=False)"
+   ]
+  },
   {
    "attachments": {},
    "cell_type": "markdown",
@@ -187,7 +235,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 17,
    "id": "102105a1",
    "metadata": {},
    "outputs": [
@@ -213,7 +261,7 @@
    "id": "8fc3487b",
    "metadata": {},
    "source": [
-    "# Persistance"
+    "# Persistence"
    ]
   },
   {
@@ -249,7 +297,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": null,
    "id": "8b7df7ae",
    "metadata": {},
    "outputs": [
@@ -287,7 +335,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": null,
    "id": "5e824f3b",
    "metadata": {},
    "outputs": [],
@@ -298,7 +346,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": null,
    "id": "61209cc3",
    "metadata": {},
    "outputs": [],
@@ -311,7 +359,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 14,
+   "execution_count": null,
    "id": "4abc3d37",
    "metadata": {},
    "outputs": [],
@@ -327,7 +375,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 15,
+   "execution_count": null,
    "id": "c7062393",
    "metadata": {},
    "outputs": [],
@@ -339,7 +387,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 16,
+   "execution_count": null,
    "id": "7e41b773",
    "metadata": {},
    "outputs": [