Remove msal-node dependency (Azure#15481)

- Leverage @azure/identity MSAL wrapper

Author: thdinizm

sdk/communication/communication-identity/package.json

@@ -85,7 +85,6 @@
     "tslib": "^2.0.0"
   },
   "devDependencies": {
-    "@azure/msal-node": "^1.0.2",
     "@azure/dev-tool": "^1.0.0",
     "@azure/eslint-plugin-azure-sdk": "^3.0.0",
     "@azure/test-utils": "^1.0.0",

sdk/communication/communication-identity/test/public/node/exchangeTeamsToken.node.spec.ts

@@ -4,7 +4,7 @@
 import { assert } from "chai";
 import { matrix } from "@azure/test-utils";
 import { env, isPlaybackMode, Recorder } from "@azure/test-utils-recorder";
-import * as msal from "@azure/msal-node";
+import { UsernamePasswordCredential } from "@azure/identity";
 import { CommunicationAccessToken, CommunicationIdentityClient } from "../../../src";
 import {
   createRecordedCommunicationIdentityClient,
@@ -47,26 +47,18 @@ matrix([[true, false]], async function(useAad) {
     it("successfully exchanges a Teams token for an ACS token", async function() {
       recorder.skip();
 
-      const msalConfig = {
-        auth: {
-          clientId: env.COMMUNICATION_M365_APP_ID,
-          authority: `${env.COMMUNICATION_M365_AAD_AUTHORITY}/${env.COMMUNICATION_M365_AAD_TENANT}`
-        }
-      };
-
-      const request = {
-        username: env.COMMUNICATION_MSAL_USERNAME,
-        password: env.COMMUNICATION_MSAL_PASSWORD,
-        scopes: [env.COMMUNICATION_M365_SCOPE]
-      };
-
-      const pca = new msal.PublicClientApplication(msalConfig);
+      const credential = new UsernamePasswordCredential(
+        env.COMMUNICATION_M365_AAD_TENANT,
+        env.COMMUNICATION_M365_APP_ID,
+        env.COMMUNICATION_MSAL_USERNAME,
+        env.COMMUNICATION_MSAL_PASSWORD
+      );
 
-      const response = await pca.acquireTokenByUsernamePassword(request);
+      const response = await credential.getToken([env.COMMUNICATION_M365_SCOPE]);
       assert.isNotNull(response);
 
       const { token, expiresOn }: CommunicationAccessToken = await client.exchangeTeamsToken(
-        response!.accessToken
+        response!.token
       );
       assert.isString(token);
       assert.instanceOf(expiresOn, Date);

sdk/communication/communication-identity/test/public/utils/recordedClient.ts

@@ -42,7 +42,6 @@ const replaceableVariables: { [k: string]: string } = {
   COMMUNICATION_MSAL_USERNAME: "MSALUsername",
   COMMUNICATION_MSAL_PASSWORD: "MSALPassword",
   COMMUNICATION_M365_APP_ID: "M365AppId",
-  COMMUNICATION_M365_AAD_AUTHORITY: "M365AADAuthority",
   COMMUNICATION_M365_AAD_TENANT: "M365AADTenant",
   COMMUNICATION_M365_SCOPE: "M365Scope",
   SKIP_INT_IDENTITY_EXCHANGE_TOKEN_TEST: "true"