index.js

const core = require('@actions/core');
const github = require('@actions/github');

async function run() {
  try {
    let requiredReviews = [];
    const team = JSON.parse(core.getInput('team'));
    const githubToken = core.getInput('GITHUB_TOKEN');
    const octokit = github.getOctokit(githubToken);
    const creator = (await octokit.pulls.get({
      owner: github.context.payload.pull_request.base.repo.owner.login,
      repo: github.context.payload.pull_request.base.repo.name,
      pull_number: github.context.payload.pull_request.number,
    })).data.user.login;

    const reviews = (await octokit.pulls.listReviews({
      owner: github.context.payload.pull_request.base.repo.owner.login,
      repo: github.context.payload.pull_request.base.repo.name,
      pull_number: github.context.payload.pull_request.number,
    })).data.map((review) => review.user.login);


    team.forEach(member => {
      requiredReviews.push(reviews.includes(member));
    });

    if(!team.includes(creator) && !requiredReviews.includes(true)) {
      core.setFailed(`Expect at leat one review from the team: ${JSON.stringify(team)}`);
    }
  } catch (error) {
    core.setFailed(error.message);
  }
}
run();