Correcting missing import, incorrect reference in example (#326)

Author: nikithauc

README.md

@@ -95,8 +95,8 @@ npm install msal@<version>
 
 ```typescript
 import { UserAgentApplication } from "msal";
-
-import { ImplicitMSALAuthenticationProvider } from "./node_modules/@microsoft/microsoft-graph-client/lib/src/ImplicitMSALAuthenticationProvider";
+import { ImplicitMSALAuthenticationProvider } from "@microsoft/microsoft-graph-client/lib/src/ImplicitMSALAuthenticationProvider";
+import { MSALAuthenticationProviderOptions } from '@microsoft/microsoft-graph-client/lib/src/MSALAuthenticationProviderOptions';
 
 // An Optional options for initializing the MSAL @see https://github.com/AzureAD/microsoft-authentication-library-for-js/wiki/MSAL-basics#configuration-options
 const msalConfig = {
@@ -110,7 +110,7 @@ const graphScopes = ["user.read", "mail.send"]; // An array of graph scopes
 // Important Note: This library implements loginPopup and acquireTokenPopup flow, remember this while initializing the msal
 // Initialize the MSAL @see https://github.com/AzureAD/microsoft-authentication-library-for-js#1-instantiate-the-useragentapplication
 const msalApplication = new UserAgentApplication(msalConfig);
-const options = new MicrosoftGraph.MSALAuthenticationProviderOptions(graphScopes);
+const options = new MSALAuthenticationProviderOptions(graphScopes);
 const authProvider = new ImplicitMSALAuthenticationProvider(msalApplication, options);
 ```