issues.get(issueNumber, function (err, issue) {
       ^
TypeError: issues.get is not a function
  at getIssue (hearForGithubIssues.js:12:9)
  at Object.<anonymous> (hearForGithubIssues.js:67:10)

const github = new Github({
token: token,
    auth: 'oauth'
})
const issues = github.getIssues(userName, repoName)
issues.get(issueNumber, (err, issue) => {
   if(err){
       error(err)
        return
   }
   callback(issue)
})