This is a possible solution for https://meta.discourse.org/t/user-api-keys-specification/48536/19
This allows for user-api-key requests to not require a redirect url.
Instead, the encypted payload will just be displayed after creation ( which can be copied
pasted into an env for a CLI, for example )
Also: Show instructions when creating user-api-key w/out redirect
This adds a view to show instructions when requesting a user-api-key
without a redirect. It adds a erb template and json format.
Also adds a i18n user_api_key.instructions for server.en.yml
