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/graphql/lib/error.js

@@ -0,0 +1,16 @@
+module.exports = class GraphqlError extends Error {
+  constructor (request, response) {
+    const message = response.data.errors[0].message
+    super(message)
+
+    Object.assign(this, response.data)
+    this.name = 'GraphqlError'
+    this.request = request
+
+    // Maintains proper stack trace (only available on V8)
+    /* istanbul ignore next */
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, this.constructor)
+    }
+  }
+}