[BUG]: Cannot redefine key

[carlosmfreitas2409]

Hello!

I have the following step (exactly as it says in the README):

- name: Setup bun
  uses: oven-sh/setup-bun@v2
  with:
    bun-version: 1.1.26
    registry-url: https://npm.pkg.github.com/
    scope: '@my-org'

- name: Install dependencies
  env:
    BUN_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  run: bun install --frozen-lockfile

And when running the workflow, the following error occurs:

The bunfig.toml was created automatically by the action and looks like this:

[install.scopes]
'@my-org' = { token = "$BUN_AUTH_TOKEN", url = "https://npm.pkg.github.com/"}

There is an issue with this problem (#33), but it is closed and without a solution.

[Yurchishin]

Fix Summary

I resolved an issue related to package installation in the CI/CD pipeline. Here's how:

1. Avoid committing .npmrc
   Remove or avoid committing the .npmrc file. For reasons I couldn't fully determine, having .npmrc with bunfig.toml in the repository caused configuration issues on the CI/CD side.

2. Commit a custom bunfig.toml file
   To enable local package installation, create and commit a bunfig.toml file with the following content and commit it:

   [install.scopes]
   '@my-org' = { token = "$BUN_AUTH_TOKEN", url = "https://npm.pkg.github.com" }

3. Set up a .env file for local development
   Ensure you have a .env file locally to define the BUN_AUTH_TOKEN for authentication:

   BUN_AUTH_TOKEN=******

4. Update your CI/CD workflow
   Use the following configuration in your GitHub Actions workflow to install dependencies:

   - name: Install Bun
     uses: oven-sh/setup-bun@v2
   - name: Install Dependencies
     run: bun install --frozen-lockfile
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # Optional
       NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }} # Optional
       BUN_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

[xhyrom]

We should probably create some sort of merge mechanic like in #39

[xhyrom]

Hi @carlosmfreitas2409 and @Yurchishin, could you please test my PR fixing this issue? I think oven-sh/setup-bun@feat/multiple-registries or oven-sh/setup-bun@7ac6e6faeade3b75e9bff88d66e9200170e311cd should work :)