requestReviewers 404 Not Found

Bug Report

Current Behavior

Endpoint 404 not found when try to requestReviewers using context.issue:

module.exports = async context => {
	const comment = context.payload.comment.body;
	const mention = comment
		.match(/\@[a-z\d](?:[a-z\d]|-(?=[a-z\d])){0,38}/gi)
		.map(user => user.slice(1));

	return context.github.pulls.requestReviewers(
		context.issue({
			reviewers: mention
		})
	);
};

Error shown as:

status: 404
...
...
request: {
    method: "POST"
    url: "https://api.github.com/repos/X/X/pulls//requested_reviewers"
    headers: {
      "accept": "application/vnd.github.v3+json",
      "user-agent": "probot/10.9.1 octokit-core.js/3.1.2 Node.js/12.18.4 (linux; x64)",
      "authorization": "token [REDACTED]",
      "content-type": "application/json; charset=utf-8"
    }
    body: "{\"issue_number\":1,\"reviewers\":[\"dwisiswant0\"]}"
    request: {}
}

Expected behavior/code Can requested for a review correctly.

Environment

• Probot version(s): v10.9.1
• Node/npm version: v12.18.4/6.14.6
• OS: Ubuntu 16.04.7 LTS

Possible Solution

N/A.

Additional context/Screenshots I followed code as: https://github.com/kentaro-m/auto-assign/blob/71d1a9c3ba4d5a88326c5e246e5ae120673e38c0/src/handler.ts#L67-L68

[gr2m]

it’s defined in Probot:

https://github.com/probot/probot/blob/8ddac1f6bbbcc92478aaec1c3f406ca3f341f151/src/context.ts#L136-L156

We don’t use any code from https://github.com/actions/toolkit

<div> GitHub</div><div>actions/toolkit</div><div>The GitHub ToolKit for developing GitHub Actions. Contribute to actions/toolkit development by creating an account on GitHub.</div>

[dwisiswant0]

AH, I see. Thanks again, @gr2m! Closing now.