# Only use internal registry

NPM_REGISTRIES=https://npm.mycompany.com
```

`NPM_REGISTRY_AUTH_LINES` is a comma-separated list of lines to append to a `.npmrc` file. This file is used to authenticate into the configured npm registries and is only required if your npm registry requires authentication. See the [npm documentation](https://docs.npmjs.com/cli/v9/configuring-npm/npmrc#auth-related-configuration) for details on the format.

```