Adding article around calling securely APIs from SPFx to TOC

Author: VesaJuvonen

misc/SharePointDocumentationToc.xml

@@ -50,6 +50,7 @@
 				<Item text="Share data between web parts" url="spfx/web-parts/guidance/share-data-between-web-parts" SEODescription="Options and practices on sharing data cross multiple web parts in single page." />
 				<Item text="Sharing data between web parts (tutorial)" url="spfx/web-parts/guidance/tutorial-share-data-between-web-parts-global-variable" SEODescription="Share data between web parts using a global variable (tutorial)." />
 				<Item text="Migrating Script Editor Web Part customizations" url="spfx/web-parts/guidance/migrate-script-editor-web-part-customizations" SEODescription="Migrate existing Script Editor Web Part customizations to the SharePoint Framework." />
+				<Item text="Connect to API secured with Azure Active Directory" url="spfx/web-parts/guidance/connect-to-api-secured-with-aad" SEODescription="Call securely APIs from client-side web parts, which are secured using Azure Active Directory." />				
 				<Item text="Office UI Fabric integration" url="spfx/web-parts/guidance/office-ui-fabric-integration" SEODescription="Using Office UI Fabric Core and Fabric React in SPFx client-side web parts." />
 				<Item text="Build web parts with SP PnP JS" url="spfx/web-parts/guidance/use-sp-pnp-js-with-spfx-web-parts" SEODescription="Using SharePoint PnP JS library in your SharePoint Framework client-side web part implementation." />
 				<Item text="Build web parts with Angular v1.x" url="spfx/web-parts/guidance/build-client-side-web-parts-with-angular-1-x" SEODescription="Use Angular 1.x to build a simple SharePoint Framework client-side web part." />