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+---
+name: Using bun install with an Azure Artifacts npm registry
+---
+
+{% callout %}
+In [Azure Artifact's](https://learn.microsoft.com/en-us/azure/devops/artifacts/npm/npmrc?view=azure-devops&tabs=windows%2Cclassic) instructions for `.npmrc`, they say to base64 encode the password. Do not do this for `bun install`. Bun will automatically base64 encode the password for you if needed.
+{% /callout %}
+
+[Azure Artifacts](https://azure.microsoft.com/en-us/products/devops/artifacts) is a package management system for Azure DevOps. It allows you to host your own private npm registry, npm packages, and other types of packages as well.
+
+---
+
+### Configure with bunfig.toml
+
+---
+
+To use it with `bun install`, add a `bunfig.toml` file to your project with the following contents. Make sure to replace `my-azure-artifacts-user` with your Azure Artifacts username, such as `jarred1234`.
+
+```toml#bunfig.toml
+[install.registry]
+url = "https://pkgs.dev.azure.com/my-azure-artifacts-user/_packaging/my-azure-artifacts-user/npm/registry"
+username = "my-azure-artifacts-user"
+# Bun v1.0.3+ supports using an environment variable here
+password = "$NPM_PASSWORD"
+```
+
+---
+
+Then assign your Azure Personal Access Token to the the `NPM_PASSWORD` environment variable. Bun [automatically reads](/docs/runtime/env) `.env` files, so create a file called `.env` in your project root. There is no need to base-64 encode this token! Bun will do this for you.
+
+```txt#.env
+NPM_PASSWORD=<paste token here>
+```
+
+---
+
+### Configure with environment variables
+
+---
+
+To configure Azure Artifacts without `bunfig.toml`, you can set the `NPM_CONFIG_REGISTRY` environment variable. The URL should include `:username` and `:_password` as query parameters. Replace `<USERNAME>` and `<PASSWORD>` with the apprropriate values.
+
+```bash#shell
+NPM_CONFIG_REGISTRY=https://pkgs.dev.azure.com/my-azure-artifacts-user/_packaging/my-azure-artifacts-user/npm/registry/:username=<USERNAME>:_password=<PASSWORD>
+```
+
+---
+
+### Don't base64 encode the password
+
+---
+
+In [Azure Artifact's](https://learn.microsoft.com/en-us/azure/devops/artifacts/npm/npmrc?view=azure-devops&tabs=windows%2Cclassic) instructions for `.npmrc`, they say to base64 encode the password. Do not do this for `bun install`. Bun will automatically base64 encode the password for you if needed.
+
+{% callout %}
+**Tip** — If it ends with `==`, it probably is base64 encoded.
+{% /callout %}
+
+---
+
+To decode a base64-encoded password, open your browser console and run:
+
+```js
+atob("<base64-encoded password>");
+```
+
+---
+
+Alternatively, use the `base64` command line tool, but doing so means it may be saved in your terminal history which is not recommended:
+
+```bash
+echo "base64-encoded-password" | base64 --decode
+```