is-following could check
if a user is following another on GitHub..
Install
$ npm install -g is-following
Usage
$ is-following tj sindresorhus
# Oops... tj is not following sindresorhus.
API
$ npm install --save is-following
Usage
const isFollowing = require('is-following')
isFollowing('user', 'targetUser')
.then(following => {
console.log(following) // true or false
})
License
MIT © EGOIST