As of April 12th, you must go to Progress SupportLink to create new support cases or to access existing cases. Please, bookmark the SupportLink URL and use the new portal to contact the support team.
You may find an example here - https://github.com/NativeScript/template-master-detail-kinvey.
You may review also the detailed information regarding using Kinvey NativeScript SDK here - https://devcenter.kinvey.com/nativescript/guides/getting-started
Let me know if you need further information.