As a programmer using the Wikibase REST API I want to understand how to authenticate with the API in order to perform actions that require authentication.
Problem:
We currently don't have documentation for this. We need it because it'll prevent people from being able to use the API.
Acceptance criteria:
- documentation is written
- documentation covers error states
- documentation covers rate limiting
- documentation is on or reachable from https://www.wikidata.org/wiki/Wikidata:REST_API