DI 20190529-1: Run terraform apply in headless mode - no region or approval prompts
Terraform apply asks for the region - need to supply these as ideally an environment specific override.
MFA - one time
Token - one time
https://github.com/reactive-streams/reactive-streams-jvm#reactive-streams used in https://docs.spring.io/spring-framework/docs/5.0.0.M1/spring-framework-reference/html/web-reactive.html and how they work with Angular or ReactJS.