generate_contributors.yml

# This is a basic workflow to help you get started with Actions
name: Generate Milestone Contributors

# Controls when the workflow will run
on:
  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:
    inputs:
      milestone:
        description: 'The milestone to generate contributors'
        required: true
        type: string

jobs:
  show_contributors:
    runs-on: ubuntu-latest
    name: A job to get contributors
    steps:
      - name: GetContribs
        id: get-contribs
        uses: Keboo/GitHubHelper@master
        with:
          milestone: '${{ inputs.milestone }}'
          repository: 'MaterialDesignInXamlToolkit'
          repository-owner: 'MaterialDesignInXAML'
          token: ${{ github.token }}
      - name: Get the output
        run: echo "${{ steps.get-contribs.outputs.contributors }}"