Update Obtain credentials using TokenLibrary.ipynb

Author: nirav2

Notebooks/Scala/Obtain credentials using TokenLibrary.ipynb

@@ -14,7 +14,16 @@
       "outputs": [],
       "metadata": {},
       "source": [
-        "// For latest documentation please run TokenLibrary.help() from Notebook\n\n",
+        "For latest documentation please run TokenLibrary.help() from Notebook\n"
+      ],
+      "attachments": {}
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "outputs": [],
+      "metadata": {},
+      "source": [
         "// By default Synapse uses AAD passthrough for authentication\n",
         "// TokenLibrary is invoked under the hood for obtaining AAD token and using it for\n",
         "// authenticating against the resource\n",