name: Checkout repos
on: push
jobs:
  checkout:
    runs-on: ubuntu-latest
    steps:
    - uses: mercari/github-app-token-generator@v1
      id: get-token
      with:
        app-private-key: ${{ secrets.APP_PRIVATE_KEY }}
        app-id: ${{ secrets.APP_ID }}
        app-installation-id: ${{ secrets.APP_INSTALLATION_ID}}
        
    - name: Check out an other repo
      uses: actions/checkout@v2
      with:
        repository: owner/repo
        token: ${{ steps.get-token.outputs.token }}