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/request-error/dist-node/index.js

@@ -0,0 +1,54 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
+
+var deprecation = require('deprecation');
+var once = _interopDefault(require('once'));
+
+const logOnce = once(deprecation => console.warn(deprecation));
+/**
+ * Error with extra properties to help with debugging
+ */
+
+class RequestError extends Error {
+  constructor(message, statusCode, options) {
+    super(message); // Maintains proper stack trace (only available on V8)
+
+    /* istanbul ignore next */
+
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, this.constructor);
+    }
+
+    this.name = "HttpError";
+    this.status = statusCode;
+    Object.defineProperty(this, "code", {
+      get() {
+        logOnce(new deprecation.Deprecation("[@octokit/request-error] `error.code` is deprecated, use `error.status`."));
+        return statusCode;
+      }
+
+    });
+    this.headers = options.headers; // redact request credentials without mutating original request options
+
+    const requestCopy = Object.assign({}, options.request);
+
+    if (options.request.headers.authorization) {
+      requestCopy.headers = Object.assign({}, options.request.headers, {
+        authorization: options.request.headers.authorization.replace(/ .*$/, " [REDACTED]")
+      });
+    }
+
+    requestCopy.url = requestCopy.url // client_id & client_secret can be passed as URL query parameters to increase rate limit
+    // see https://developer.github.com/v3/#increasing-the-unauthenticated-rate-limit-for-oauth-applications
+    .replace(/\bclient_secret=\w+/g, "client_secret=[REDACTED]") // OAuth tokens can be passed as URL query parameters, although it is not recommended
+    // see https://developer.github.com/v3/#oauth2-token-sent-in-a-header
+    .replace(/\baccess_token=\w+/g, "access_token=[REDACTED]");
+    this.request = requestCopy;
+  }
+
+}
+
+exports.RequestError = RequestError;