I have been searching for documentation regarding the REST API.
All I have found is the Swagger page. It gives a good overview but it doesn't provide any information about valid values for individual fields.
From what I have found there is no such documentation available.
How can I find out what values are valid for all different fields in the API?
For a POST to
salesRuleCouponRepositoryV1), how do I find out what the valid values for "type" are and what they mean?