This library is meant to demonstrate authentication for sample purposes; it should be treated as a starting point for building an application, and is not a general purpose solution. To explore authentication options, see our authentication library for Node.
A comprehensive list of changes in each version may be found in
the CHANGELOG.
Our client libraries follow the Node.js release schedule.
Libraries are compatible with all current active and maintenance versions of
Node.js.
If you are using an end-of-life version of Node.js, we recommend that you update
as soon as possible to an actively supported LTS version.
Google's client libraries support legacy versions of Node.js runtimes on a
best-efforts basis with the following warnings:
Legacy versions are not tested in continuous integration.
Some security patches and features cannot be backported.
Dependencies cannot be kept up-to-date.
Client libraries targeting some end-of-life versions of Node.js are available, and
can be installed through npm dist-tags.
The dist-tags follow the naming convention legacy-(version).
For example, npm install @google-cloud/local-auth@legacy-8 installs client libraries
for versions compatible with Node.js 8.
This library is considered to be in preview. This means it is still a
work-in-progress and under active development. Any release is subject to
backwards-incompatible changes at any time.
Please note that this README.md, the samples/README.md,
and a variety of configuration files in this repository (including .nycrc and tsconfig.json)
are generated from a central template. To edit one of these files, make an edit
to its templates in
directory.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["Version latestkeyboard_arrow_down\n\n- [3.0.0 (latest)](/nodejs/docs/reference/local-auth/latest)\n- [2.1.1](/nodejs/docs/reference/local-auth/2.1.1) \n\n[Google Local Auth: Node.js Client](https://github.com/googleapis/nodejs-local-auth)\n====================================================================================\n\n[](https://cloud.google.com/terms/launch-stages)\n[](https://www.npmjs.org/package/@google-cloud/local-auth)\n\nThis library is meant to demonstrate authentication for sample purposes; it should be treated as a starting point for building an application, and is not a general purpose solution. To explore authentication options, see our [authentication library for Node](https://github.com/googleapis/google-auth-library-nodejs).\n\nA comprehensive list of changes in each version may be found in\n[the CHANGELOG](https://github.com/googleapis/nodejs-local-auth/blob/main/CHANGELOG.md).\n\n- [Google Local Auth Node.js Client API Reference](https://github.com/googleapis/nodejs-local-auth)\n\n- [github.com/googleapis/nodejs-local-auth](https://github.com/googleapis/nodejs-local-auth)\n\nRead more about the client libraries for Cloud APIs, including the older\nGoogle APIs Client Libraries, in [Client Libraries Explained](https://cloud.google.com/apis/docs/client-libraries-explained).\n\n**Table of contents:**\n\n- [Quickstart](#quickstart)\n\n - [Installing the client library](#installing-the-client-library)\n - [Using the client library](#using-the-client-library)\n- [Samples](#samples)\n- [Versioning](#versioning)\n- [Contributing](#contributing)\n- [License](#license)\n\nQuickstart\n----------\n\n### Installing the client library\n\n npm install @google-cloud/local-auth\n\n### Using the client library\n\n const {authenticate} = require('@google-cloud/local-auth');\n\n async function quickstart() {\n const localAuth = await authenticate({\n scopes: ['https://www.googleapis.com/auth/blogger'],\n keyfilePath: '/path/to/keys.json',\n });\n console.log('Tokens:', localAuth.credentials);\n }\n quickstart();\n\nSamples\n-------\n\nSamples are in the [`samples/`](https://github.com/googleapis/nodejs-local-auth/tree/main/samples) directory. Each sample's `README.md` has instructions for running its sample.\n\nThe [Google Local Auth Node.js Client API Reference](https://github.com/googleapis/nodejs-local-auth) documentation\nalso contains samples.\n\nSupported Node.js Versions\n--------------------------\n\nOur client libraries follow the [Node.js release schedule](https://github.com/nodejs/release#release-schedule).\nLibraries are compatible with all current *active* and *maintenance* versions of\nNode.js.\nIf you are using an end-of-life version of Node.js, we recommend that you update\nas soon as possible to an actively supported LTS version.\n\nGoogle's client libraries support legacy versions of Node.js runtimes on a\nbest-efforts basis with the following warnings:\n\n- Legacy versions are not tested in continuous integration.\n- Some security patches and features cannot be backported.\n- Dependencies cannot be kept up-to-date.\n\nClient libraries targeting some end-of-life versions of Node.js are available, and\ncan be installed through npm [dist-tags](https://docs.npmjs.com/cli/dist-tag).\nThe dist-tags follow the naming convention `legacy-(version)`.\nFor example, `npm install @google-cloud/local-auth@legacy-8` installs client libraries\nfor versions compatible with Node.js 8.\n\nVersioning\n----------\n\nThis library follows [Semantic Versioning](http://semver.org/).\n\nThis library is considered to be in **preview**. This means it is still a\nwork-in-progress and under active development. Any release is subject to\nbackwards-incompatible changes at any time.\n\nMore Information: [Google Cloud Platform Launch Stages](https://cloud.google.com/terms/launch-stages)\n\nContributing\n------------\n\nContributions welcome! See the [Contributing Guide](https://github.com/googleapis/nodejs-local-auth/blob/main/CONTRIBUTING.md).\n\nPlease note that this `README.md`, the `samples/README.md`,\nand a variety of configuration files in this repository (including `.nycrc` and `tsconfig.json`)\nare generated from a central template. To edit one of these files, make an edit\nto its templates in\n[directory](https://github.com/googleapis/synthtool).\n\nLicense\n-------\n\nApache Version 2.0\n\nSee [LICENSE](https://github.com/googleapis/nodejs-local-auth/blob/main/LICENSE)"]]