Add PBandGraphOauth scaffold and auth UI

node_modules/@microsoft/microsoft-graph-client/src/IAuthProvider.ts

@@ -0,0 +1,15 @@
+/**
+ * -------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation.  All Rights Reserved.  Licensed under the MIT License.
+ * See License in the project root for license information.
+ * -------------------------------------------------------------------------------------------
+ */
+
+import { AuthProviderCallback } from "./IAuthProviderCallback";
+
+/**
+ * @interface
+ * Signature that holds authProvider
+ * @callback - The anonymous callback function which takes a single param
+ */
+export type AuthProvider = (done: AuthProviderCallback) => void;