Added an utility that validates GitHub token.

dist/check-token.js

@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+"use strict";var n=require("util");async function i(t,e){let s=`https://api.github.com/repos/${t}/releases/latest`,r={Accept:"application/vnd.github.v3+json","User-Agent":"setup-github-release-action"};e&&(r.Authorization=`token ${e}`);let o=await fetch(s,{headers:r});if(!o.ok){let a=await o.text();throw new Error(`Failed to fetch latest release for ${t}: ${o.statusText}. ${a}`)}return await o.json()}async function c(){let{positionals:t}=(0,n.parseArgs)({allowPositionals:!0}),e=t[0]||process.env.GITHUB_TOKEN;e||(console.error("Error: No GitHub token provided as an argument or found in GITHUB_TOKEN environment variable."),process.exit(1));try{console.log("Verifying GitHub token..."),await i("actions/checkout",e),console.log("\x1B[32mSuccess: The provided GitHub token is valid and has sufficient permissions to access public repositories.\x1B[0m")}catch(s){console.error("\x1B[31mError: GitHub token verification failed.\x1B[0m"),console.error(`Reason: ${s.message}`),process.exit(1)}}c();