adding ms grpah client

libs/modules/src/msGraph/ms-graph.service.ts

@@ -0,0 +1,22 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { MsGraphOptions } from './ms-graph.interface';
+import { MS_GRAPH_OPTIONS } from './ms-graph.constants';
+import { ClientSecretCredential } from '@azure/identity';
+import { Client } from '@microsoft/microsoft-graph-client';
+import { TokenCredentialAuthenticationProvider } from '@microsoft/microsoft-graph-client/authProviders/azureTokenCredentials'
+
+@Injectable()
+export class MsGraphService {
+    constructor(@Inject(MS_GRAPH_OPTIONS) private msGraphOptions: MsGraphOptions) {}
+
+    async getMsGraphClient(): Promise<Client> {
+        const credential = new ClientSecretCredential(this.msGraphOptions.tenantId, this.msGraphOptions.clientId, this.msGraphOptions.clientSecret);
+        const authProvider = new TokenCredentialAuthenticationProvider(credential, { scopes: ['.default'] });
+        const client = Client.initWithMiddleware({
+            debugLogging: true,
+            authProvider
+        });
+
+        return client;
+    }
+}