mws-3953 -- bulk api with subscribers and topic details

[shiva-sc]

No description provided.

[jimleroyer]

Hi Shiva! Jimmy from the GCNotify team. The code will work to sent the bulk to send to GCNotify from a code reading (we have not tested it). The one note I would leave is to make sure to have proper error handling when interacting with the API, i.e. if you get a http 500 class failure, you can try again with an exponential backoff retry strategy. You could have a sophisticated mechanism with queues or queue these async for later with a timer (up for a max number of times). If you don't try again on failures, you might have to manage some of these manually otherwise.

Hope that helps!