ELMO API is an api to allow other applications to access data.
rails generate versionist:new_api_version v1 API::V1 --header=name:Accept value:"application/vnd.getelmo.org+json; version=1"
rails generate versionist:new_controller <controller> <module::version>
example:
rails generate versionist:new_controller missions API::V1
rails generate versionist:copy_api_version <old version> <old module namespace> <new version> <new module namespace>