`[warning]Resource not accessible by integration` when running against PRs

[nrb]

Given the following workflow:

name: 'Auto Assign PR Reviewers'
on: pull_request

jobs: 
  add-reviews:
    runs-on: ubuntu-latest
    steps:
      - uses: kentaro-m/auto-assign-action@v1.1.1
        with: 
          configuration-path: ".github/auto_assign.yml"
          repo-token: '${{ secrets.GITHUB_TOKEN }}'

And the following auto_assign.yml:

addReviewers: true
addAssignees: author

reviewers:
  - nrb
  - ashish-amarnath
  - carlisia

I see the following output when running this action against all PRs

Run kentaro-m/auto-assign-action@v1.1.1
  with:
    configuration-path: .github/auto_assign.yml
    repo-token: ***
##[warning]Resource not accessible by integration
##[warning]Resource not accessible by integration

I'm not quite sure what I've got wrong. You can see the directory structure at https://github.com/vmware-tanzu/velero/tree/main/.github

I was also seeing this behavior without the GITHUB_TOKEN, and added it thinking that would give the action access to act on the repository.

[bogdandrutu]

I have the same problem, and the action does not assign any reviewer/assignees. Any help would be appreciated.

[bogdandrutu]

I found the solution for this, you need to use on: pull_request_target because that runs with the right set of permissions to allow the action to set labels, maybe @kentaro-m you can add this to the readme.

[WuZhuoran]

I got the same issue.
And I found that after I change to on: pull_request_target
It shows the following after submit PR.

The yml I used is:

name: 'Auto Assign'
on: pull_request_target

jobs:
  add-reviews:
    runs-on: ubuntu-latest
    steps:
      - uses: kentaro-m/auto-assign-action@v1.1.2
        with:
          repo-token: '${{ secrets.GITHUB_TOKEN }}'
          configuration-path: ".github/auto_assign.yml" # Only needed if you use something other than .github/auto_assign.yml