I can't agree enough. I can't find anything else with support that the Spring ecosystem has built for many cloud stacks (my experience is with AWS). Being able to choose from a whole host have identity providers, social, and other things for login and user data that generally just fits in to the normal auth and security mechanisms solves a problem we had for years with new applications.

It's certainly daunting if you're green to it and there isn't a grizzled vet around, but if you're trying to build for more than contrived simple solutions that you need to monitor, scale, and secure I don't know anything else out there that gets you so far down the road almost at the beginning.