I want to contribute to contentful.js. So, I checked out the code then execute npm install as instructed on https://github.com/contentful/contentful.js/blob/master/CONTRIBUTING.md.
However, npm failed to install @contentful/content-source-maps with following error.
npm error code E403
npm error 403 403 Forbidden - GET https://npm.pkg.github.com/download/@contentful/content-source-maps/0.11.33/2150c1bf0944d0fb1922abce6f86ca216d365ea1 - Permission permission_denied: read_package
npm error 403 In most cases, you or one of your dependencies are requesting
npm error 403 a package version that is forbidden by your security policy, or
npm error 403 on a server you do not have access to.
I've created a GitHub PAT token with read_package and put it in .npmrc already.