add modules

node_modules/@octokit/rest/plugins/authentication/index.js

@@ -0,0 +1,21 @@
+module.exports = authenticationPlugin
+
+const beforeRequest = require('./before-request')
+const requestError = require('./request-error')
+const validate = require('./validate')
+
+function authenticationPlugin (octokit, options) {
+  if (!options.auth) {
+    return
+  }
+
+  validate(options.auth)
+
+  const state = {
+    octokit,
+    auth: options.auth
+  }
+
+  octokit.hook.before('request', beforeRequest.bind(null, state))
+  octokit.hook.error('request', requestError.bind(null, state))
+}