Reorganized the module structure.

src/azure/client-auth.js

@@ -0,0 +1,37 @@
+import { DefaultAzureCredential, ClientSecretCredential, DeviceCodeCredential } from "@azure/identity";
+
+export async function getCredential(credentialType, options) {
+  switch (credentialType) {
+    case "d":
+    case "default":
+      return new DefaultAzureCredential();
+    case "cs":
+    case "clientSecret":
+      if (!options.tenantId || !options.clientId || !options.clientSecret) {
+        throw new Error(
+          "tenantId, clientId, and clientSecret are required for ClientSecretCredential",
+        );
+      }
+      return new ClientSecretCredential(
+        options.tenantId,
+        options.clientId,
+        options.clientSecret,
+      );
+    case "dc":
+    case "deviceCode":
+      if (!options.tenantId || !options.clientId) {
+        throw new Error(
+          "tenantId and clientId are required for DeviceCodeCredential",
+        );
+      }
+      return new DeviceCodeCredential({
+        tenantId: options.tenantId,
+        clientId: options.clientId,
+        userPromptCallback: (info) => {
+          console.log(info.message);
+        },
+      });
+    default:
+      throw new Error(`Unsupported credential type: ${credentialType}`);
+  }
+}