Add auth support (#21)

* Updates

* Update

* Update

* Update

* Update

* Yarn sometimes prefers npmrc, so use same token

* Description

* Update readme

* Feedback

* Add type

* new toolkit and scoped registries

* npmrc in RUNNER_TEMP

* Dont always auth

* Try exporting blank token

* Get auth working for now pending runner changes

* Fix string interpolation for auth token.

* Don't export both userconfigs

* Update authutil.js

* Add single quotes for authString

* Fix the registry string.

* Use userconfig and append trailing slash

* Keep in root of repo

* Try just adding auth token

* Remove auth token

* Try changes again

* Add tests

* Npm and GPR samples

* Add types

node_modules/@octokit/rest/plugins/pagination/iterator.js

@@ -0,0 +1,31 @@
+module.exports = iterator
+
+const normalizePaginatedListResponse = require('./normalize-paginated-list-response')
+
+function iterator (octokit, options) {
+  const headers = options.headers
+  let url = octokit.request.endpoint(options).url
+
+  return {
+    [Symbol.asyncIterator]: () => ({
+      next () {
+        if (!url) {
+          return Promise.resolve({ done: true })
+        }
+
+        return octokit.request({ url, headers })
+
+          .then((response) => {
+            normalizePaginatedListResponse(octokit, url, response)
+
+            // `response.headers.link` format:
+            // '<https://api.github.com/users/aseemk/followers?page=2>; rel="next", <https://api.github.com/users/aseemk/followers?page=2>; rel="last"'
+            // sets `url` to undefined if "next" URL is not present or `link` header is not set
+            url = ((response.headers.link || '').match(/<([^>]+)>;\s*rel="next"/) || [])[1]
+
+            return { value: response }
+          })
+      }
+    })
+  }
+}