[Digital Twins] Use "@azure-tools/test-credential"; (Azure#20494)

Author: HarshaNalluru

sdk/digitaltwins/digital-twins-core/package.json

@@ -74,6 +74,7 @@
     "@azure/dev-tool": "^1.0.0",
     "@azure/eslint-plugin-azure-sdk": "^3.0.0",
     "@azure/identity": "^2.0.1",
+    "@azure-tools/test-credential": "^1.0.0",
     "@azure-tools/test-recorder": "^1.0.0",
     "@microsoft/api-extractor": "^7.18.11",
     "@types/chai": "^4.1.6",

sdk/digitaltwins/digital-twins-core/test/utils/testAuthentication.ts

@@ -1,11 +1,11 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
 
-import { ClientSecretCredential } from "@azure/identity";
 import { DigitalTwinsClient } from "../../src";
 import { env, record, RecorderEnvironmentSetup } from "@azure-tools/test-recorder";
 import { uniqueString } from "./recorderUtils";
 import TestClient from "./testClient";
+import { createTestCredential } from "@azure-tools/test-credential";
 
 export async function authenticate(that: Mocha.Context): Promise<any> {
   const keySuffix = uniqueString();
@@ -25,11 +25,7 @@ export async function authenticate(that: Mocha.Context): Promise<any> {
     queryParametersToSkip: [],
   };
   const recorder = record(that, recorderEnvSetup);
-  const credential = new ClientSecretCredential(
-    env.AZURE_TENANT_ID,
-    env.AZURE_CLIENT_ID,
-    env.AZURE_CLIENT_SECRET
-  );
+  const credential = createTestCredential();
   const AZURE_DIGITALTWINS_URL = env.AZURE_DIGITALTWINS_URL;
   const client = new DigitalTwinsClient(AZURE_DIGITALTWINS_URL, credential);
   const testClient = new TestClient(client);